I'd suggest you search the Macau section. Many brothers have taken their time to write very informative reviews.
These are the popular ones: 18, the one, east spa, east castle spa and Familia Nobre. To save a little money, you can go to Shun Tak in Sheung Wan to buy the voucher.
more info:
http://forum.sex141.com/eforum/v ... ighlight=shun%2Btak
http://forum.sex141.com/eforum/v ... ighlight=shun%2Btak