Reviews on RVs are like anything else and the negative reviews can come from anything; the salesman didn't smile, it had 5 lug wheels and I wanted 6, didn't come standard with 2 acs; the list is endless.
On top of that every RV is completely different. A used RV could have been in the hands of someone that kept it in immaculate condition, was savvy with RV issues and stayed on top of all of them and made upgrades, or, it could have belonged to Ned (from the 3rd grade) that looked after nothing, figured you need to beat the tar out of it to get your moneys worth etc. Only you will be able to tell as you look over the trailer.
No matter who owned it you need to take the inspection list from this site and go over the unit from the roof to the ground and everything in between. At the end of that hopefully you will have a better idea of what YOU think about it.
Danny & Susan wife of 53 years
2019 Ram 3500 Laramie CC SB 6.4 4x4 4.10
2020 Montana High Country 331RL