Let me try to help you with your choice. We have a 28SGS, 2013 model. Overall quility - I would rate "Good/Very Good". But I can only compare to our former TT (not a Keystone product) which was "poor,poor,poor".
Like;
Location of TV/Ent. system. Good viewing from chairs & sofa.
Good kitchen counter space.
Lot of windows (light) in seating area.
Dis-likes;
Queen bed is a Camper Queen (60"x75"). Would love to have a Full Size Queen (60"x80") I am 6'-2" tall. "Future Mod".
If I was to factory order I would delete the carpet in the living area. very cheep carpet.
Our unit only has a 10' awning.
Things I've Changed/Added;
LED Bulbs in most interior lights.
LED Step light on exterior steps.
Battery cutoff switch.
Slideout Awnings.
"Progressive" Electric Management System (EMS).
And yes I am the "LumpyOatmeal" that responded to you on another Forum.
Allan