For the price this is a nice Headset.  You can hear people very cleraly beacuse the speaker is very loud.  Also people can hear you very clearly because the microphone is very sensitive.  But this Headset is so uncomfortable, that if I wear it for more than a few mins I have to take it off, beacuse it hurts so much.  Also if you have small ears, it won't stay on your ear.  I am going to be using a Motorola HS820 Headset which is so comfortable and light.  I can wear it for hours and don't even know it is there.  But the Motorola HS820 Headset speaker and microphone is not as good as the Plantronics M2500 Headset.