IMO whether or not you would swim depends on where you are from!! The pools are heated but not that warm. I live in TX and we just don't swim if the pool doesn't feel like bath water! We tried swimming at WL last Jan and were all too cold, even my dd who is a swim fanatic. It was warm out but the water was just not warm enough for us.
Now, if you are from the North then likely you will think it feels awesome!!