Works very well. Mic volume is clear and screens out background noise very well. Between the three inner-ear pieces, one will likely fit well. I use the large piece and can wear it for a couple hours comfortably.Like many others have noted, the most irritating thing about the headset is that the power button is very small and can be difficult to press. It's not a deal-breaker, though.The wrap-around style helps keep the device against your head. Unlike other headsets that just hang next to your ear, this one actually feels like it's a part of your head. You can move your head briskly and lean it any which way without any fear that the headset will fall off.All around it's a great headset. It's not small, but the size only matters if you're overly concerned about style. The arm swivels and folds up to leave the headset reasonably flat, and it rotates both directions equally well and works just as well over either ear.