I gave it 4 stars instead of 5 because: Sometimes, it seems like the treble could be a bit louder. This is probably because of the phone I am using. With a Samsung Mantra, the treble is fine. With an iPhone 5s, it sounds like too much bass, and not enough treble. This is a slight issue because at my age, bass sounds can be more difficult to distinguish clearly than treble sounds. The end effect is that the caller's voice is a little bit muffled when I use this headset with an iPhone 5s. Not lower in volume, but difficult to understand. The volume is fine- just "blunted," if you know what I mean. Slightly muffled. Also, this headset can be used on either left or right ear. That means the little thing on the side that lays against my head swivels. Because of it's shape and that swivel, and because I wear my hair in a barrette, it gets caught in my hair too easily when I try to remove the headset. 96% of the time, I have to struggle to get it untangled from my hair. This is very annoying. To avoid the problem, I swivel that whatever you call it around so that the back is against my hair instead of laying flat as it is designed to do. On long calls, I have to move it about 1/2 inch to a different place from time to time to avoid discomfort. This isn't a deal breaker. I'll tape a foam pad on the flat of it eventually, to thicken it so it can't get lodged under my hair. Until then, I'll keep moving it around on my head, because this headset is a lifesaver! SO MUCH BETTER than a, in-the-ear headset. Great volume, my callers hear me well, as do I them, and I can make noise that doen't interfer while I'm talking. Buy this headset. It's effective. :) Also, when it eventually will no longer hold a charge, I can buy a replacement battery from eBay for about $12, and carefully install it myself. I think there's a Yotube video showing how- or maybe the battery seller had one. I haven't changed the battery myself in so long that I don't remember where I saw that video.
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