We bought this trailer when it first came out in July 2014 (yes, a 2015 model) because the floorplan was EXACTLY what we had been searching for. While the floorplan is very nice, we have had multiple roof leaking issues since new with no support from Dutchman. We had the roof sealed and the trailer winterized at the end of every season by the dealer. When the trailer was 3 years old, we noticed a soft spot on the floor just inside the main door. Odd, since there were no water stains and we had never seen signs of a leak. Took it to the dealer, and the floor had to be replaced due to water damage - 6" in and 7' long. The dealer said it was due to a lack of lap sealant on the roof (which they corrected). Dutchman would not cover any of it ($3200). Since then, we have been hyper vigilant about leaks. Every single time we camp in it, we find a new leak. This time, it was the window at the rear bunk -- or, more accurately, the aluminum degraded beyond the silicon seal at that window -- more below.
Beyond the leaking issue, the aluminum siding literally rotted holes through the siding. Top strip only, multiple holes. This is a camper that is stored indoors (in a pole building) when not in use. The first hole was discovered when the unit was 6 months old. Dutchman would not replace the strip, and the dealer put a patch over the hole (looks like some kind of tape) that has held ever since -- but the same strip corrodes more holes every year. Major issue.
This goes beyond the usual minor stuff (loose slideout seal, moldings that we re-attached, a loose fixture here and there, and a plug that had to be fixed because the contacts never pierced the wires) -- minor stuff being expected on a new unit. I love the functionality of the Aspen Trail, but the build quality was not good, and Dutchman customer support is much worst than other companies (we owned a Coleman previously with no issues in customer support).