~FURTHER UPDATE, ALMOST THREE YEARS LATER~Well, I still own these headphones, and even though I don't use them very regularly, they've held up well over the years, still fit comfortably, and still deliver great sound! At this stage of the game, there are plenty of Bluetooth headsets out there that run, price-wise, over, under, and around the same price that you'll find these at, but Jabra always has (in my experience) and probably always will make good, quality, reliable products. This one is definitely worth the selling price, even in today's technologically updated market.~UPDATE~I've now owned my Jabra headset for about two weeks, and I still LOVE IT! I used my phone and this headset to provide my music for my workout, and the headset stayed put perfectly, and delivered above-average sound quality throughout the duration of my workout. In travelling through numerous airports over the holiday season, it was the perfect way to drown out incessant background airport noise. I LOVE this thing!*~*In my initial search for a headset for my phone, I was hoping to find a set that would give me good audio for my MP3s, as well as function well when I am on a call. As far as I can tell, after only owning this for a day, this headset more than adequately covers every requirement I had for it. I took a call yesterday on this, and had the call recipient complaining about the audio being too loud, which, to me, is a plus. I'm not stuck any more asking the standard "can you hear me now?" when on my cell phone using a hands-free set.As far as the audio goes when listening to my MP3s, this definitely has stereo sound in my opinion, even if it is a bit lacking when it comes to bass. The volume and audio quality delivered by this Jabra headset beats the poor quality audio that I was used to listening to from the cheapie-cheapie off-brand headset I'd spent thirteen bucks for at my local CompUSA a few months back. Time and again, "you get what you pay for" has been proven to me to be true, and it seems to be the case once again here.I wasn't even using my phone's MP3 feature prior to receiving this headset. Now that I've got it, and see what my phone's MP3 player feature is truly capable of, I'm definitely looking forward to putting it to use in my travels, and exercise activities. Jabra comes through for me once again!