My wife (mdfiregal) and I have a 2007 T-276 SR and we love it. Our two kids (7 & 8 ) love the bunks. We ordered ours and have the sleeper sofa vs. the futon. My mother-in-law camps with us a lot and is very comfortable on the sofa bed. The slide gives you plenty of room with five of us and three to four dogs!!!
The only thing I have found negative is the floor is a little springy and has been that way since new.
We looked at a very similar floorplan in another trailer (don't remember the brand), that a friend worked for the dealer and was offering us his employee discount (it was $9 K less), but after sitting in it for five minutes at the show we knew we wanted SUNLINE
This was just before the factory closed, but there is no doubt I would do the same thing again.
PM me or my wife if you have specific questions, we'll try our best to answer them.
2004 Dodge Ram 2500 Club Cab 4x4 CTD
2007 Sunline Solaris T-276-SR: Misty Blue/Cherry
2001 Dodge Ram 1500 Reg Cab 4x4 OFF-ROAD