I think the things that I did not like the best for this unit was that the earloop and the ear gels come loose readily, particularly if you do not keep the gel turned to one side or the other. I lost the gels twice when they came out unexpectantly. I also lost the unit twice when the earloop grabbed onto something and was pulled from my pocket. Unfortunately, the last time it was lost for good. One other thing about the gels, is that I never felt comfortable with them, and I tried a couple sizes.As far as sound quality, it was usually decent; but I noticed a popping with some phone calls. I never could figure out what caused the popping.I liked the ease of charging it and pairing was particularly easy. I particularly liked the ability to charge it from a battery in case of emergency. Speaking of battery life, I found it needed to be charged pretty much every day to make sure that it was ready when I needed it.