Good idea, but flimsy cord and unreliable retraction
I love the idea of a retractable cable, but this cord is so flimsy and the retraction mechanism so iffy that I managed to permanantly break it within 30 minutes of having opened it (I was stretching it out to see how long it was, the little center piece moved to the side, and in the process of fixing it... I unraveled the cord altogether.) I'm a techie, usually very easy on my equipment. If I broke it so quickly, I have little confidence in this product. Get something sturdier if you plan to use it often.

Nice convenient product
This product is pretty good. You absolutely DO have to be careful not to tangle the cable inside the hub. I have cautioned my kids how to use it. After all, the fact that it winds up within itself, leaving it just 4" or so, is the main reason I bought it. I was a bit disappointed when, as I was awaiting delivery, I saw the exact same product in a department store for about $2 less...

Cable for my Zune
It works well. The only complaint is when retracting the cord it sometimes nest's up. It untagles easily in seconds. Other then that no problems.

Not Happy :-(
This product was seemingly perfect for my needs. The only problem was when I plugged it in, it didn't work! I was very dissapointed because it is really hard to find quality retractable cables these days. I could not get consistent connection with the cable, as a result I heard nothing but crackling and popping. You have to jimmy the cable just right to hear anything resembling music, but mostly just crackling, popping and utter frustration. Don't waste your time or money on this product.

okay for a couple of months
this worked well for a couple of months, reducing cable clutter in my car. The retractor works fine too, sometimes it takes some patience to retract the whole thing, cause it stops sometimes. Also, the audio connection became really bad, the sound keeps going in and out and I've have to shake the cable around after rough road or just turing.