You never know about a brand until you start taking things apart to see underneath why they leaked. This is the single biggest problem with most all campers out there.
There are still some very good and even older sheet metal sided campers still around, can attest for some good workmanship.
Best thing is like what you see and next fine tooth comb it throughout.
One year a good employee in charge of quality, or even someone responsible for the shell/frame can be mistreated and move on to a different manufacturer. You just never know.
I would be looking real hard for a camper that has been stored under cover most it's life. They get the two thumbs up.
Oh yes... a good test is to close up the camper tight, run the furnace up to about 75 for about 15 minutes. After you have been outside, used to fresh air, then jump inside the camper to see if you small mold/ mildew/ rot. Some folks can tell if there's a problem that way.