Grand Design Momentum M-Class reviews

We Factory ordered our rig in 2019. When we received our rig we had an issue with the AC not being installed correctly and our water heater leaking. All issues were brought directly to Grand design, and they took car of everything. We were full time living in our rig so Grand Design brought us a rig to live in while they took ours back to Indiana and made repairs. I will say they stand behind their product. If you are looking to go full time, Grand Design is the only full time rig I would buy. Show less

Like many others here, we did A LOT of research before purchasing a toy hauler. We understand that most RV's are poorly built (somehow this industry gets away with it year after year with little to no consequence) so we decided to spend the extra money and we purchased our Grand Design 21G in December 2020 based on many reviews which indicated Grand Design was better than most brands. Oooops. Nope. This is definitely NOT the case. Without listing the massive amount of problems and issues we've experienced with this overpriced piece of trash, and after over 9 trips to the dealership "service department" (LOLOL "service") and over 27 months of our trailer sitting in this "service department" while the so-called "technicians" just make things even worse, we've hired an attorney and we are pursuing a lemon law buyback. (why aren't more of you doing this???) This trailer is easily the biggest disappointment of a purchase we've ever made in our lives, and we aren't going to let them get away with it. We suggest more of you do the same. Grand Design is just as big, or in our case, an even bigger piece of junk than any of the others. Their customer service? Yeah, they put on a decent enough show at first, but when push comes to shove, they're the typical spineless dirty weasels who know they built and sold garbage. Show less

We purchased our Momentum in October, 2024 from a Lazy Days dealership in IA. We drove from AZ to IA to pick it up. When we stopped for the night on our way back, we walked into the garage and the bucket seats had fallen off the rails and damaged the sliding glass doors out to the deck. This was the fault of the dealership not doing a proper installation. We got back to AZ and have been trying to get these doors replaced since that time. It’s now almost the end of April and we still DON’T HAVE the parts!!! The coach is sitting at Camping World in Surprise, AZ in the sun - and the kicker is we pay for covered parking! We are so disgusted with Lazy Days in Council Bluffs, IA as well as the warranty department for Grand Design. Buyer beware!!!!! Show less

Originally bought the Toy Hauler to take our Polaris 4 wheeler on our trips. Given the limited RV parks that allow 4-wheelers, the garage turned into a perfect 2nd bedroom with it's own half bath and TV. Additionally, the bench and tables were a great dining area. Used the porch many times as a perfect outdoor area as well. Having the garage gave us all kinds of flexibility, from transporting our e-bikes and anything else we wanted to take, to using the garage as moving van storage. Moved our Son and Wife's belongings from SC to FL when they bought their first house. While the garage wasn't used as originally planned, it was very flexible and turned out to be the perfect second bedroom for our visiting family! The Momentum has a 40K btu furnace for winter and (3) 15K btu air conditioners for the Summer. With it's 4 season insulation, it was perfect when we went skiing in 10 degree WV or 110 degrees in AZ. Given all the appliances (18 cu ft Fridge/Freezer, gas range and oven, convection micro-oven and island sink), the 351M has all the comforts of home on wheels. Entertainment is just like home with (3) flat screen TV's and a 3 zone pioneer stereo system. Lastly, the Grand Design 351M was designed very well and built with much higher quality than most RV's. Show less

This is the third camper we have purchased for our family. We switched to Grand Design because of all the great things we have heard about them. This camper has been nothing but a nightmare. We purchased it brand new. After our first trip, the glass entry door shattered. It took about 3 months to replace it. The dealer did install a temporary door so the summer wasn't wasted. Then, the exterior ladder pulled out of sidewall, interior panels started popping off the walls, the back garage wall was not securely fastened to the side walls, and one of the bolts on the garage door broke off. It turns out it was missing multiple studs and backers. Grand Design told us to take it to the dealer for warranty repairs. That was an epic fail. The dealer did more damage to everything they touched and took multiple shortcuts. We complained and Grand Design said they would fix it. We just got the camper back and not only did they make more damage, but they also cut corners and failed to fix everything. You can see daylight through the panels by the nightstands, the entertainment cabinet is scratched, marred, and damaged. Nothing was resealed or even replaced. We reached back out to Grand Design and they told us to take it back to the dealer for warranty work. That is where we are now. Standby for updates. Show less

I would not recommend due to issues with slide out seals, auto leveling, toilet flush out leak, incorrectly installed door frames, screw falling off under the master closet and screw coming up through the floor in front of the master closet. Grand Design refuses to replacement the parts that were damaged before we bought the fifth wheel brand new or the parts that have failed to work right after purchase. They are using deny, delay, defend tactics. We have lost months of use of our fifth wheel and see no end in sight. Show less

Rv was assembled in a hurry. Very poor and sloppy workmanship. End result is missing parts, things falling apart. Excess frame flex/failure. Wrong bolts, missing bolts, bad welds, suspension failure, bad frame design, things falling apart. Serious safety issues. To many corners were cut to make a profit and sacrifices safety. Show less

This RV checks almost all the boxes if you need a toy hauler but still camp in conventional campgrounds as it’s still under 40’. This is the trailer for you. Good kitchen storage , kitchen is cramped with more than 2 people in it at once. Limited space for eating but good couch layout for watching TV. Big master bedroom and good size shower and great half bath in the garage for the kids. Small outside storage gotta get creative but still works. This trailer has had the least amount of problems out of my previous Dutchman and Forest River trailers. Would purchase again. Show less

I decided to trade in my Motorhome for a Toy Hauler and chose Grand Design because of the supposedly good reviews they have that are very questionable today. I picked up my new Momentum 29G in December 2023, it was supposed to bring us fun and adventure. During the first rain, water started coming in through both sliders, the generator stopped working, black water started leaking, and the reclining seats came loose. I took it under warranty, they had it for 3 months. I went out in the RV and during the first rain, the same problem, water through both sliders and the generator not working. Three months again under warranty, they let me know it was ready, I pick it up and the same problem continues, water coming in through the sliders and the generator not working. 10 months later without using the camper, it is scheduled to go under warranty again. I have called and written to Grand Design and they have not resolved anything. This is my third RV, my first Grand Design and it will be the last. Show less

I’m sure everyone like my wife and I want to get away and an RV and enjoy the experience and go to different places. My wife and I had a 2009 stellar eclipse toy hauler over the years. We had to replace many of the junk parts that they put on this unit. My wife and I would always notice the Grand Design momentum has been the top of the class draft about buying one for six years and then decided this year. We pulled the plug and bought one. The momentum 320 G looks good from the outside, but things went wrong the very beginning on the first day of our first trip the middle air condition went out that took seven weeks to repair. On second trip the generator would start. It doesn’t look like a bright future for traveling in our Grand Design momentum 322. I’m expressing to you that the quality of products have no quality buyers beware Show less