If I could go back, Id probably spend the extra money on the Sony headphones. I cant wait to try them out in the gym! They are flimsy (though thats to be expected since theyre titled disposable) and the size is off. My main issue is they exstreemly tight around the back of the knee and upper part of the sock. 5 narrow). But these drivers seem underpowered for there size and you notice that quickly. This bluetooth set is one of the best I have ever purchased. Again as with the S2 I cant really fault them at all for the price, they sound great and whilst pretty no-frills they offer really great value for money. Fit is good. They’re a hard material anchor, not for drywall, and if you do use them in drywall then it has to be for a very light load.