Pros:* I love the fit. Very balanced and hard to lose while working out. A big plus over the Motorola H700 I had before that was always falling off. This is significant because this is a replacement for the H700 I lost jogging in the rain.* Outbound voice quality is reported superior to my old Motorola by my friends.* Incoming sound is as good as the Motorola and actually a bit better when you account for the fit to ear seal.Cons:* Claims of 6 hours of talk time are greatly inflated. More like 3 right off the charger. This is a problem. Now I need a car charger for it.* Too many buttons and not intuitive. Not responsive sometimes to commands. Sluggish switching.* The ear pieces cost you a certain amount of ambient hearing of your environment. Whatever size you use, it still really cuts down on your hearing of the world around you on that side. Compared to the "floppy" Motorola, this is extreme. The Motorola had no impact on hearing that I would notice.The talk time is my biggest complaint. The rest is just nitpicking.