Love this RV! Reading the other reviews of other models and issues I must be lucky! I do live full time and have had my 4007 G2 now for 4 months and have had no issues. We started in the winter season in TN but have also been to Florida and experienced the heat. Only issue I have had is the bathroom door had become misaligned and I had to router out the door cavity to accept the lower door catch.
I did remove the original inverter, battery charger, and battery. Put the 1000 Watt inverter in my F350. I self installed a "Mac-Daddy" solar power system so I can't comment on the original battery and related electrical system. But didn't see anything odd with equipment or wiring.
I love my 4007 G2 and would buy another.
Wish... floor insulation didn't end at the garage door separating the two areas.. argh cold floors.
And larger than 14 gauge wire for most 110v wiring (but it's an RV and this is normal) dont use 1500 watt setting for electric heaters!! 900 is ok.