Mine are good, I have read about problems and Sweat, But I haven't experienced it. Mine work awesome, they last longer than I want to listen. They are "muddy" in sound, I use the "treble booster" function in EQ on my iPhone to combat it but they still have a lot of lows as most head phones sound of this type. I got mine from Newegg for $37 shipped a month ago. I like them better than any wired headphone. I have a set of Skull Candy that I never use now. The play/pause and Volume up and down buttons work with the iPhone, but the track forward and backward do not. They do take some getting used to the way they sit on your head, but after a few times you really don't think too much about it, they are really light and stay on my ears and head even if you shake your head violently. I have a small head too, I wear a medium Helmet for riding a Motorcycle, so they will fit even better if you have a larger head. I would say try them out, if you don't like them I bet you can sell them on e-bay to recoup some cash. The bonus also is if you have a Mac with Bluetooth they will pair to it too.
