The Motorola H605 is yet another bluetooth device that I have purchased because no one has been truly acceptable. This one, although relatively an older model, is surprisingly comfortable in either ear and is truly VERY loud and I have no trouble hearing my calls. On the other hand, as usual, my callers say I sound muffled at times. This is a problem inherent in any headset with the microphone placed so far away from the mouth. However, for the extremely low price which I bought it, it is one of the more satisfactory units I have used. At first, it may seem too bulky when compared to other units, but since the majority of the unit sits behind the ear and not on top of it, when wearing it, it looks much less obvious than other much smaller units. Thank you for the opportunity to review my purchase.