Call quality is about a 3.5 out of 5. I never have dropped a call however, it crackles every now and then. Audio is great except for the fact that the BT dongle for my iPod drains the iPod batter in a day instead of it lasting almost a week. Thank god for wall/car/USB chargers.

If it's one thing you don't want to do on a mountain, especially when it is cold, is take your gloves off and muck around with your iPod. With the controls on the outside of your helmet, you can adjust volume and even change the tracks as you are barreling down the mountain. The only reason you would need to handle your iPod is if you need to change artists/albums. Even then, just stick your entire collection on Shuffle, and easily skip the mellow tracks. Battery life is pretty decent, and I have yet to have them run out of juice before I do (or before the mountain closes).

The only issue I've had with these headphones is when it gets WICKED cold out. Bluetooth doesn't work so well in really cold conditions (that particular day it was probably around - 10 to - 20 C / 14 to -4 F with wind chill). Luckily, Giro gives you a cord to wire your iPod to your headphones when the signal starts to cut out.

I have been able to pair my iPhone with these (only for phone functionality), however have yet to make/receive a phone call. Personally, I don't want to talk to anyone while screaming down a cruiser or playing in some pow. So no big loss there. Answering those calls may let your boss know that you're not in your cubicle anyway.

I'd highly recommend these to anyone that wants to cut the cord and make interacting with their music on the mountain easier.