I bought this headset primarily for use at the gym. I use it with my Blackjack II cell phone. The sound is good. The controls for volume, track forward and back, play/pause are very easy to use.
Recommend this product?
The only downside I can mention is that the ear pieces don't stay in your ears because the plastic part of the headset that wraps over your ears is stiff and doesn't bend to conform to your ears. However, I can't say that it is even a big issue. They are very comfortable overall.
Using the headset for taking calls provides average performance. If you are buying this primarily for cell phone calls I would not suggest it simply for the price. However, if you are looking for a headset primarily for listening to the music on your phone and still have the ability to take calls then I would strongly suggest it!! Be sure to shop around! I got mine for $45 shipped.