Plantronics M100 works very well for me and I am very satisfied with the performance. I was looking for a under $25 headset and Plantronics M100 is a great value for the money. Some of the cool features include ability to know the talk time (battery power) remaining, ON / OFF Switch, Light weight and you will barely feel it. Voice clarity is very good if you are looking for a basic headset, Plantronics M100 is more than basic but still is under $30. Rakuten service was awesome and i received it exactly in about 5 days from the time of order and with free shipping !
This product is comfortable enough and sound is fine too. So far I had no complains about the sound quality from the other end of the phone. I can hear others through this device even when I am on the road. I think for the price, this is a good deal. had this for about two months and still works fine.