My wife & I were there on 8/24 for the day. We stayed at CTI during the week and went over for the day. We were at CSS in 2003 and not much has changed in the last 6 years. The location is just as tropical as it was then. Charlie is still around and Sunset beach is just as great as it was the first time we were there. Most of the minor changes we saw were cosmetic. We did not see the rooms, but the resort looks like it did 6 years ago. Hope this helps.
We were at CSS last week and met a couple from Texas that had been staying at the resort annually since it was Grand Lido Sans Souci. They said that the food is much better since the resort became Couples Sans Souci.
I know everything, and I'm always right (just ask my husband).