We have been to many different mineral spas, mostly in Canada, and a couple in the U.S. The Mineral Springs (in particular) are just what the doctor ordered.
The temperatures, in both pools, is perfect (not too hold or too cold).
We just love that one pool can be accessed to the other one without leaving the first pool. Also, that the second one is outside (while the first one is indoors).
The water is clean, and so are the changing rooms. They have a good amount of showers, changing rooms, lockers and toilets to accommodate the numerous clients.

My thoughts on the actual hotel, and the restaurant will be separate (as my feelings are quite the same about them).