We have the 25' Safari SS and find it quite comfortable for the five of us. me, my wife two kids (17 & 13) and one hyper cocker spaniel.
The wife and I have the bed at the back, one son on the dinette, and one son on the couch. Although we haven't been away for an extended period of time (longest was 10 nights) we have never felt cramped, or on top of each other - including when it rained for 3 solid days and nights.
We looked at all the 25' Safaris and felt that the SS offered the best arrangement for us as it gave us 2 seating areas and the dinette. That being said, all four of us are often to be found on the couch watching a movie if the weather is particularly foul (see above).
Hope this helps.
Malcolm & Randy
WBCCI # 12523