I have a Sun Lite. The company is out of business now. Mine has held up exceptionally well. When I started doing pop-up camper research (after my purchase, the deal for mine came out of the blue), I discovered that my new pride and joy would be reduced to kindling after one trip down a fire road due to it's wood frame construction, at least according to the interweb lore.
I'll admit that I cringe a bit on particularly rough roads, and I have also re-evaluated the difficulty of the trail I'm willing to attempt, but the camper has been trouble free so far. I think my expectations were a little higher than what I'd be willing to put any truck/camper through, regardless of construction material, now that I own one. We've had ours for a little over three years now, I'd guess we have 100 nights in it, maybe 500 miles of dirt roads, and a few thousand of Baja's paved roads.:sombrero:, add in a couple of years of chasing for a desert race team, often at remote pits down miserable roads. I'm fortunate enough that I also have a Jeep. When base camping and intending to go exploring, we'll flat tow the Jeep.
I live/play in the SoCal/Baja deserts for the most part, so AC was almost a requirement...we lie to people and tell them it was for our dogs, and now our grandchildren add to the lie. Hindsight being 20/20, I should have installed a small home style unit in the rear window, rather than on the roof. My roof mount unit is designed for pop-up campers/trailers, and the roof of my camper is/was claimed to be rated for it. I half expect to find it laying in the middle of the floor after going down rough dirt roads. So far it has held up with no issues. The window rattler would have been half the cost