I have a few devices (2 cells and various audio listening devices) and I like the ability to keep one headset on me that will work with all of them. I also like a headset that I don't have to worry about charging and putting an increased battery drain on my cell phones.The Jabra c120 has very good sound quality. It measures up to the other Jabra products that I've used in the past. The eargels channel the sound directly into your ear and seem to increase the sound volume and clarity. They fit comfortably in the ear and come in 3 different sizes for a more custom fit. When on the cell phones, people seem to be able to hear me better than when I'm using the handset.The one quirk that this product has is a slightly longer cord for the left earpiece with no obvious explanation for it. I looked in the scant documentation for the product and found no mention of this. I finally came across a picture on the website showing a woman with both earpieces going around the right side of her head (instead of the commom Y formation going to each side of the head). I guess this was the design of the longer wire to wrap around the neck to the left ear, but I don't see any advantage to this. Jabra should state that purpose somewhere on the packaging, papers, or website.It would also be nice to have a clip on the left wire so that extra earpiece isn't dangling around or needlessly stuck in your ear on non-stereo devices (on which only the right earpiece is active). A carrying case would also be nice to keep up with the 3.5mm pin adapter when not in use and to neatly store the headset so the wires don't get tangled.