Steven Gailliaert TriathlonBruges5/513-9-2015I felt the effect enormously the first time when I had slept in the altitude tent for a month and then left on a cycling trip some two weeks later. I trained very strongly then, both cycling and running. The second time I slept in it as a preparation for my Ironman in Mallorca. Again, I will certainly have had an effect, but then I had also trained heavily the 3 previous months. The first time, I had trained very little and still had a strong stage. Soon I will sleep in the tent again, again in preparation of my cycling training in Mojacar at the beginning of March. I have no negative comments about your service, on the contrary. You come when it's best for the customer (even later in the evening). The installation is quick and the explanation is clear. Even if there are questions later, the customer can come to you.