I can air down to 70 lbs in the rear before the TPMS goes off. I find the ride very nice compared to any 3/4 or 1 ton pickup.
All the seats can be removed. The middle benches are heavy, though. It would also be nice to have the option of folding seats, but I haven't come across any in the aftermarket. You'd think they'd be available though.
Parking garages, yeah, you'll get real close to the ceiling in some. I actually tagged the ceiling slightly in one as I was going a bit too fast and a bump kicked me up a couple inches. Go slow, or just stay out of parking garages.
The hitch is easy to install. The wiring was a bit of trouble though. The dealership messed it up, so I ended up taking it to an RV dealer and they sorted it out. But yeah, find a shop that knows what they're doing.
