Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Easy to use, comfortable, great volume headset.

I specifically purchased my Siemens S66 phone because it supported Bluetooth. And after experiencing it's underpowered volume setting I quickly purchased this Bluetooth Headset and it has made all the difference! Comfortable to wear and easy to use, the volume sounds great, even in noisy environments like loud coffeeshops. I have no problem recommending buying this (but I should have bought it from Amazon instead of the Cingular store and saved $30!).