I stayed in Summer 2006. We were allocated rooms in the annexe and really liked it there, some folk think it's too far from the action as it's across a small road. We didnt find this a problem at all. The rooms looked new, or if not freshly decorated. You are also close to the adult only pool if you want to take advantage of your AI drinks without walking over to the main hotel, as the Adult only pool has a pool bar.
The only possible down side of the annexe is sometimes you can here Club Sun Citys entertainment at night but it stops at midnight, and your unlikely to be in your room until then anyway, unless you have very young kids I guess.
There is a massive thread on this hotel on this board somewhere as a few regulars HTer's have been, one went last summer so her info is more up to date than mine. Try putting the hotels name in the Search.
You will love it there everyone does.
I'm going back to O. Deniz this summer, this time to Lykia World and still wonder if I should have just booked the Bel Beach again.
HTH, Doe