I'm on a quest to find sports headphones that work with my iPhone and don't die after about 3 months of use. I'm a runner, so use headphones about 5 times a week while out running, plus on some cycle rides. These started off feeling OK. The fit wasn't great, the band stayed over my ears fine, but the ear buds popped out quite easily and I found myself often pushing them back in and there are no size option on the ear fittings, which I found very unusual, so if your ear canal is a perfect match for the ear bud size, you're onto a winner. I also found that the band stuck out a long way at the back and would constantly snag on the collar of my cold weather running top and my cycling top. The controls were easy to access & use as long as I wasn't wearing gloves, in which case it became hit and miss. The sound quality was fine as far as I can tell, but I'm no expert. It mostly worked with my iPhone, but it wasn't the most responsive unit I've tried. I will say that they are very light. and worked well with the phone (even worked well while out cycling). However, like most headphones I've found, they just stopped working after about 6 weeks of use. In my experience, they are just not sweat proof. If your train (and sweat) a lot, you'll send up sending these back.