I recently purchased an Audiovox SMT5600. I wanted a bluetooth headset with the following requirements:1) Under $50 bucks2) Good sound quality coming and going3) Comfortable to wear, with or without glassesI purchased several bluetooth headset to try including ones from Logitech, Plantronics and Motorola, and several off-brands, including one from IOGEAR. Several had decent sound quality on incoming calls, but the person on the other end of the line was contantly asking me to repeat myself, especially if I was outside or in a windy environment. One in particular, (I believe it was the Logitech) had great outgoing sound quality, but extremely poor incoming quality. I was contstantly asking the other person to repeat themselves. The Scala 500 had great sound quality all around. The volume is more than adequate, even in noisy conditions. It was easy to hear and I rarely had to repeat myself even in 15mph winds. (which is a normal day here in Oklahoma)As an added bonus, It comes with a clip for glasses. As a glasses wearer, I've found this to be an exremely comfortable and easy solution to the bluetooth problem. Both the loop and the Clip are exremly comfortable.As I did not keep any of the other headsets, I cannot speak to comparitive battery life, but I only have to charge mine for a few hours every week or so. For business travel, this is very convenient, as I don't have to lug an extra charger around for this headset.All in all, I am extremely satisfied with my purchase, and I believe that this is by far the best headset for the money. At under $50, it is a steal!!!!!!Note: Scala did not include a silicone cap in the product. They ask you to send off for it. It wil take 6 to 8 weeks to come in, and they will tell you that you will have to superglue it to your headset. Don't bother unless you have an extremely large inner ear. It is a great product without the glued on piece that takes 2 months to get.