We just stayed four nights a SSR. It IS BEAUTIFUL! We stayed in the Grandstand section. Even though it is a lengthy drive to/from the front desk building, it is just a very short walk. It is so peaceful and quiet there. The CM's there were all very wonderful.
The Grandstand is the newest section...it just opened about a month ago.
I think the reason there is always something available is because it is HUGE! I know OKW is HUGE, too, but if I remember correctly, there are only 3 floors in those buildings...SSR has four floors, so that's one extra floor of rooms.
Your price of $189 per night sounds pretty reasonable for that room! All buildings have elevators, there's a microwave, a decent size mini fridge, a coffee machine and a toaster. AND everything is new.