I bought a 2021 BT Cruiser 5240 sitting on a 2021 Ford E-350 chassis :
I give it a 3.5 out of 5 for quality, certain things were installed good and other things were not.
Here is a list of the bad :
The gray/black waste valves and plumbing was installed wrong, unable to open black tank valve unless laying on my back, so I rebuilt the whole drain assemble and now it works like it suppose to.
The A/C was installed wrong, the bolts inside were to tight and cause the A/C fan to rub and make noise, loosen bolts and now A/C works good, the gasket was smashed to much causing the issue.
Fresh water pump made the pipes in RV rattle the back bathroom cabinet, installed a flex hose from pump to hard water lines and installed flex hose lines from hard water lines under cabinet to faucet and now its quiet.
[ had to cut back the hard lines install new fittings and install new flex rubber water lines to faucet so it stops the water lines from vibrating from water pump ]
RV entry door had wind noise while driving, removed trim around door and no insulation around door and day light coming in, I sprayed expanding foam around door and replaced trim now its quiet.
The 1st step inside the RV the wood floor part was weak, it needed extra bracing to support step, to make the repair easy without tearing up the floor I pulled back the rubber floor over the wood drilled 3 small holes and filled the cavity with expanding foam and now the step inside is rock solid.
Fiberglass curved shell that meets the Ford cab also had wind noise, removed interior inside and found no insulation at that area, just the fiberglass shell were it meets the cab, installed sound proof insulation now its quiet.
The guy that did the exterior silicone caulking did a OK job but was sloppy so I spent a weekend cleaning silicone caulking where it should not be.
Loose screws here and there inside and out, retighten screws.
Passenger seat swivel base was not tighten down good, it rattled while driving, tighten the bolts and now its solid.
The RV rear had a small sag and had a sway issue when I bought it, because of the fresh water tank and fuel tank behind the rear axle it caused the issue, so I bought Sumo Springs for the rear [1500 lb rate] and installed them, it raised the back about a inch and stopped the sway.
[Gulf stream should install Sumo Springs to stop this issue]
The shower even though no leaks and works good the shower pan is very thin, Gulfstream needs a thicker shower pan, should last a few years if I take it easy in the shower.
Here is a list of the good :
The fiberglass roof is installed good, all seams caulked good and zero leaks from rain.
Slideout was installed good and straight, goes in and out proper and seals good when shut.
Interior cabinets installed good and straight, no rattles and looks good.
Murphy bed is installed good and works correctly, as well as the electric couch.
TV goes up and down good.
All other systems work good and installed good.
All electric lights and plugs work good and installed correct.
All appliances work good and installed good.
RV Structure is straight and sound.
For the price of $75,000 I find the RV to be good all around for that price, I have been in the maintenance field my whole life so repairing plumbing, electric, cabinets, floors, comes easy to me, all the work was done myself no need to take back to dealer to have some kid repair it wrong and wait months to get it done.
So if anyone is thinking of buying a BT Cruiser do expect some minor issues and learn to repair it yourself and make sure you get the lowest price possible from the dealer.