Went to York Hall having booked one of the 'mob deal' offers available on Wahanda. A mixed bag for me - it's a reasonably priced venue with nice therapists.
It is quite easy to get to via public transport, and as someone else pointed out - while the outside doesn't look like much, the spa itself is really quite nice inside.
I was slightly early for my appointment, so the reception staff gave me a towel to sit on (those marble benches... coooold!) and a cup of tea which was nice and made the wait for the therapist very pleasant. The treatment room itself was quiet and nice - the heated tables are definitely a good idea for cold days. The therapist explained what the treatment would involve and it was all very pleasant - I had a back scrub, back mask and massage.
The one criticism that I have is that I don't know whether staff are familiar with the product lines they are offering - on arrival I handed in the 'mob-deal' voucher which specified 3 treatments totalling an hour. When I saw the clock after the therapist had left the room and told me to get dressed, the treatment had taken 40 minutes. When I went outside to check her next appointment had already arrived so that was it for me!