Hands down my favourite spa. Anywhere. I've been a regular client here for the past few years, and the quality and service have been consistently exceptional and exceptionally consistent. Love love love it.
I do have to say, though, that while the flotation baths get all the hype (and hey, they ARE great!) the pulsar sessions are what really keep me coming back for more. As to the massages - they have been some of the best I have ever received. The friends I have referred here have been equally happy with their experiences. This applies to both male and female friends ... yes, guys, despite the (somewhat creepy?) name of this place, you will probably love the experience too.
I suggest booking the complete trio package later in the evening, since it's so relaxing you will probably want to go to bed right afterwards anyways.
Ps. It's about a block away from Metro Beaubien, so it's super convenient to get to.