I read a number of the preceding reviews, and find them all to be true. It just depends on 1-- your ear shape, and 2-- whether you prefer light and could break apart to heavy, solid, and weighing down one side of your head. Seriously, I have used other headsets with very bad luck. This is the only Bluetooth I have used. As far as the ear nib slipping off, I would say two things: you can buy extras on the after-market, and I do for just such occasions, and the reason it comes off is so you can try either small, medium or large, which to me is the biggest selling point. My ears are, well, not your normal average ear (though I use a Medium ear nib, for the record). And this fits me so snug that I forget I have it on. Like at least one of the reviewers said, itcan get uncomfortable. But that usually takes at least an hour. Then I just take it out for awhile, and put it back and it feels great again. As far as sound quality goes, it is on the tinny side, but I don't think you do much better than this in a phone headset. It's not for your Ipod, it's for voice.I haven't used the others, and I think it's unlikely that I will.