We drove by the resort you are talking about. We didn't go in but from the outside it looked very well maintained. Sorry I can't offer more.
We spent two weeks in Siesta Key in December and fell in love with the place. We are booked for another two weeks this December and can hardly wait. It is such an incredible place. The people are so friendly, the restaurants great, the beach, AMAZING!!! Siesta Key is very clean and feels very safe. I was often on my own out walking with the kids very early in the morning and absolutely no problems on the beach or on side streets. My husband on the other hand is a night hawk and often walked the beach/streets VERY late at night and everyone was great with him also.
I can't see someone going to Siesta Key and not having a wonderful time.
The price you have been quoted sounds very reasonable as well.