I have a Four Wheel Campers Grandby that I part time in. You didn't give a lot of information on how you use a camper, so forgive me if I make some assumptions that are not true for your use.
Expedition Portal:
http://forum.expeditionportal.com has a very active pop-up camper section with a wide variety of camper types and uses.
Wander the West:
http://www.wanderthewest.com/forum/ also has a pop-up camper section that has a very active Four Wheel Campers and All Terrain Campers membership.
ATC is the smaller company that will do custom work if you want something unique.
As to what I have: The FWC campers are built tough; I don't baby mine. It was made in 1978 and is still in usable shape. Exterior is still the original, except for the door which I rebuilt last year. Soft side 'canvas' is original. Roof looks like someone went after it with a ball-pein hammer but the camper does not leak. When I had the welded aluminum frame exposed three years ago it was still solid; all welds intact. Loaded with two weeks boondocking supplies for me and a beagle it weighs in at < 1300 lbs. Keeps me well under GVWR for a 3/4 ton truck.
They are on the spartan side for amenities; haven't seen one with a wet bath. It will keep you dry and warm in reasonable weather. It is a place to sleep, cook, and store your stuff. For two people you have to learn 'the dance' to maneuver around inside. Coming from tent camping it is a 5 star accommodation to me. I built my own interior.
The good: low profile means less wind drag, I loose about 1.5 to 2.0 MPG with the camper on. Less weight and lower center of gravity. Lower profile means less effect when driving with side winds. Getting things off the roof is easier.
The bad: You have to lift the top and make the bed before sleeping. It is a pain to take down in high winds. It will not hold temperature (heated or cooled) as well as a hard sided camper. It will not insulate from outside noise as well as a hard side camper, almost the same noise level as a tent. The low profile limits the mattress options. There is less storage than a hard side camper. You have to be more concerned with the weight of anything put on the roof, it has to be taken off or lifted.
As to the ugly: you are going to get very wet packing up in a driving rain.
If you leave your camper on full time you might want to consider a flat bed model: more usable space.
All I can think of for now.
-- Spiff