My wife and I have a 2011 Adventurer 80GS and really like it.
The camper is completely accessible even with the slide drawn in which makes 'stealth' camping a breeze. I did replace the 15 gal water tank with a 25 gal tank. It has small (6 gal) black and gray tanks but we have learned to live with that (we can dump to a 10 gal Barker tote that I can wheel to an outhouse if needed). Quality is about what you'd expect. We had a leak whenever we filled up the water tank which I found was from a screw point that pierced the fill tube - I replaced that when I replace the water tank. Also our camper came with a manual slide but it wouldn't seal tight at the top and let water in. The dealer put in an electric slide mechanism under warranty and everything seals up tight now.
It is a small camper but we don't feel cramped. My wife and I lived in it for two weeks straight on a road trip in 2012 and still like the camper (and each other). Dry weight is listed as 1485, wet weight is closer to 2200. We have it on a long box which the brochure (at the time) said would fit. It doesn't really (hits wheel fenders in box) and the new brochures now indicate that it only fits short box pickups. In order to make it work, we have the camper set back about 10 inches. The COG is still in front of the rear wheels and I use the (bonus!) space between the front of the box and the front of the camper to store camping equipment like the Barker tote.