To be honest, I was pretty skeptical (to be brutally honest: the website and apps didn't give me the feeling of quality that I would have expected based on the reviews of the glasses), but then I took the plunge and ordered anyway. The order and app worked flawlessly. About the glasses: they actually fit perfectly, especially without any pressure on the eyes and with relatively little tension on the elastic bands. All in all, I initially had the feeling that the glasses looked very flimsy, but none of this was confirmed. After my IM70.3 last month and some swimming training with it, I'm thinking about getting an indoor version for the winter season. Respect for such a well-rounded product and 100% recommendation from me.