When you google Keystone, add "quality" & "problems"...
Met a couple in a CG who bought a new Keystone TT for their retirement years. It leaked like a sieve from day one. Dealer could not fix it and it got sent to the factory who only made it worse. He ended up repairing it himself.
Know a couple with a Keystone. The quality of the cabinetry was atrocious. I repaired the dinette seating which was falling apart and cabinet drawers and doors for them. Below is a photo of the roller catch on one of their cabinet doors. The 2 pieces of the latch are over an inch apart! Also a photo of a bent catch and another showing a dealer repair on a catch.
Have seen Keystone TTs at RV shows and the cabinet doors & drawers were wonky and not closing properly. Hard to imagine they put them on display like that for all to see.
I do think though, that there is a difference in quality between the one manufactured in the east vs west. In some fairness, quality can be hit and miss and vary a lot between brands. We had a previous TT that ended up being replaced under warranty. I would either take someone with you to look at TTs that has been around them for a while or even hire an independent RV tech or at least go talk to one, on a used or even new TT. Could save a lot of grief in the end.


