Went to Strøm spa for the first time the first week of Oct. I had a coupon that made it a very good price for two. It's a convenient location if you have a car and good directional sense as I nearly took the wrong turn a couple times. I seriously think Nun's island is the only place in Montreal and around that has roundabouts! On the outside it looks unassuming but their facilities are quite nice and clean. I found it enjoyable at 15C but it could stand to be better if even warmer. The difference I noticed from other sites is they don't enforce many rules such as no loud taking, no cell phones, etc. If you prefer to have a quiet experience, take the morning or early afternoon off and go. It could be quite busy during peak hours and not as relaxing.