To be honest I've been to a sauna only once, place on Rose Street and I didn't really care for it and so haven't tried any of the other places with bigger and better reputations.
I sympathise with your dilemma as it is getting more difficult to find a reliable and cosy punt through AW these days. I am fortunate that I live in Edinburgh so I have recently returned to visiting saunas after many (too many) years of making my way through the indies.
If your only experience of a sauna is Rose Street, I would urge you to try another - more reliable - one. Rose Street would be a negative in anyone's book, as would be the Ambassador.
The lottery of finding a decent punt on AW is such that I have recently started visiting FBSM girls. A lot cheaper with a similar ending. The prices on AW is killing it, especially if you don't know what you are really getting....afterall, how many times have we arrived at a door and not turned away when we should have.
I used to, out of loyalty, stay with the same WG if they were good enough. Becky Carlyle was one earlier example, but girls just dont stay long enough anymore. The best ones continue to work but keep their pool of clients to themselves...if you are in, you are in; if not, you are out! It seems that for years I have been searching for that ideal WG but she just doesn't seem to be out there anymore.
I am getting on a bit now, so the days of a hard fuck are over as I just cant do it anymore, so the best option and VFM are the FBSM options as there is still that element of "chase" as you hope to convert her!
Anyway...the point of this ramble is to state that because of a number of factors I understand where Poopy is coming from, but don't close all doors yet.