The only reason they got 4 instead of 5 stars is that the flip flop noise is annoying. They dont hurt after starting in for a while which is a big thing for me because my ears are small. If you do use the app its simple and provides an EQ which makes a difference. Helps me get a a good sweat and has a lot of coverage. I find wired ones last longer. Think of it this way, we all have friends that want to borrow our headphones/earbuds but now if you share your earbuds with friends they can have their own dedicated set to use. So get it fast. The only thing my boys really complained about was not having a back strap for running and chasing each other. I put it in the basement and will utilize it for seasonal wear. They are the best value for your dollars.