I've been using the Neoptx stick on readers for almost a year. The trick is to not get the mask too wet when initially sticking the lens on. I couldn't read the settings on my GoPro and now I can. I like the idea of the Dive Gear Express house brand mask with vision correction, however, I have a small face and find most adult masks are too big. I think most of us have tried different masks and have come up with the perfect one for our faces. Anyhow, the stick ons work fine and can be removed and repositioned in your mask if you don't like how you've initially positioned them.