Have been twice, the first time didn't have an amazing experience due to building work and refurbishments (which is not ideal on a relaxing spa day), we were offered a voucher to return and the experience was much more enjoyable. the facilities are great, lovely steam room (my favourite) and a sauna. also has a nice large jacuzzi with strong jets for maximum relaxation.
The pool is a good size for casual swimming. Changing rooms are nicely decorated and a nice size with a free use hair dryer....