Spa on a boat is a great concept on paper but this place didn't provide the services and atmosphere that goes with the expectations and the prices. I went with two friends during Holiday season right after Christmas
Pro:
-Great facility
-Decent view during the day (you won't see much during the night)
Con:
-Way too crowded (more a tourist place than a spa to relax)
-Toilettes (so small and the decor is worse than the ones in your community centers)
-RUDE STAFF: NO SMILE, ANGRY LOOKING
Instead of making rude and very loud "SSSHHHHH" noises to people who were making the slightest noises, how about walking over and ASKING them to lower their voices?
Very overrated overall. It's worth a visit if you are visiting Montreal, but has little to offer Montrealers.