Ours is the RoughIt brand it's an 8 person dome tent with a sunshade on the front, we left the back room open but had 2 queen (i think) airbeds in there and there was plenty of room for a suitcase and extra's in the middle.
The sunshade had enough room to fit a table for storage, if you google it you will see a pic.
TBH even despite the higb price tag most aren't made to last as long as the old canvas ones did, it's all a matter of taking care not to pull things too tightly and to make sure you never pack it when wet etc.
If you take good care of it it should last, ours seems ok but we haven't had it long.
We quite like it for the kids as with the sunroom if it's raining you could put a tarp down and they still have room thats slightly under cover.

