Elmspa is a quiet oasis and it is my go-to spa for RMT massages.
I like the fact that it is almost always quiet there, and the garden-like waiting area is great! There are always plenty of magazines there to keep you entertained while waiting for the masseuse, and it is a great that they provide hot tea, fruits and fruit infused water.
There is a small steamroom in the changerooms. If you want to use it, it would be advisable to go there a bit early since it would take at least 10 minutes for the steam to heat up the room (it is normally off) - hardly an issue if you know what to expect.
Over the years, there have been some changes to the masseuses working here. Currently it is Peter who is mainly there and he does a great job with massages. His main technique is swedish but he also does some stretching techniques to relax various muscles groups, and not the hard brute-force types that some people might be used to.
As for prices, I think they are pretty competitive. If you buy 4 session they will throw in a 5th one for free, which is great!
Overall, I would recommend Elmspa if you are looking for a quiet place for a spa day.