bought this headset for use with my motorola razr v3 phone. i figured sticking with motorola proprietary equipment would be a good idea. i'm a bit diappointed, though. the performance is mediocre. on occasion it refuses to take a call, it just goes silent, which makes for a mad scramble to turn the thing off to take the call on the handset. no fun. the audio is also not outstanding. i can hear, but even with the volume at the top setting, i am left asking people to repeat themselves occasionally. it also tends to blot out any chance of clear voice transmission in the wind, which is, i suppose, to be expected. my final critique is that the ear loop isnt quite secure. it mounts only on the right ear and doesnt remain steady. if i'm sitting in my car, using it, it isnt a problem, but with much movement at all it flops out from my ear.perhaps my expectations for such a headset are too high, but this one didnt quite make the mark.