I'll first start out by saying that I absolutely love these headphones. I never really thought that I'd be so happy going with a cordless headphone, but the convenience factor is amazing. When I'm in our small office, I can leave my BlackBerry sitting on my desk, and walk anywhere in the office, fill up my coffee, go to the fridge, and never drop out. Sound quality is relatively good, about what you'd expect from a headphone that is oriented towards an active lifestyle that is making some compromise on design for sound quality.The buds that will come installed are garbage. Don't even bother with them, they hurt my ears after wearing for a short period of time. Make sure you put the rubber ones that are symmetrical on. My buddy bought a "white box" kit from another vendor who was selling for much cheaper, and they didn't come with any of the accessories, so be careful where you buy!In regards to dropping out. Strangely, with my phone on my hip, the signal does sometimes drop out. Very intermittent, talking like a fraction of a second, but of course noticeable when you're playing music.The protrusion of the headphones from the back of the head is very pronounced. They are a snug fit going around your head, some people complain that they don't think that they will be able to get them on. I have a big head (self proclaimed) and I have no issues with that. I can't sit back on the sofa with them on because of the protrusion. Likewise, this means you can't bench press wearing these headphones.The headphones also double as a hands free headset. The mic is back near the earpiece. I didn't think that it would pick up speech very well, but it does quite a good job as a handsfree device as well. I don't recommend driving with it of course, I use it at the office. The BlackBerry rings in the earpiece when listening to music to alert you to a call. Another caveat is that there is no notification in the headset when you receive an email.I've had great success pairing these with the Jabra A120S. I actually hooked up the Jabra to the audio out on my LCD TV so I can listen to the TV (ie. play on the Wii) without disturbing others. My wife uses it for the same purpose while on the treadmill so she doesn't need to blast the volume. I used the A120 on a Creative Vision with these headphones as well. No complaints. Now that I have an iPod (wake up Apple - give us BT) I'll use the A120 for pairing when I need this style headphone.Overall the cordless convenience is very nice. They could use some refinement, but they are a nice addition to your headphone collection. I would not classify them as an audiophile headset, but an active headset that can take some light abuse.