Pretty well thught out, and easy to use. I use them with my KRAZR K1 GSM for music and calls. Easy to pair, and I like the fact that you have buttons on both sides .... very intuative to use. It is a much better value than the 560s, and is not particularly fragile as the 560 is. At first I found them a bit uncomfortable after a short time, however you have to get the knack of fitting the top of your ear though the space between the ear cup and strap. I like the fact that you can turn the lights off if you wish.The only thing I do not like is turning the unit off and on. I would have preferred an on and off switch. Although I have both sets of phones, if I had to own only one I would get these instead of the 560s since they are a better buy, and will take the strain of every day use much better than the 560s which are pretty fragile, and can break easily.