UPDATE APRIL 2011: The cord has gotten stuck a few times if it's retracted too quickly into the housing. This last time I pulled hard and it released, but the wire was caught and it stripped the rubber casing from the wire. It still works and I've wrapped tape around the wire so it's not bare. In the past I've definitely unplugged this device in case there was some electrical fault. For the money - this works, but it's not the James Bond gadget I'd like it to be. Would I buy another. Probably, but I got my gf a different one for her phone.

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Original review:

This is a must have. I got this for when I use the GPS in the car. The Epic is power hungry and I only use the phone a little. I've also got an extra battery since the Epic has died a few times when I'm away from the car or USB.
This retractable cord is tiny, like a thread. The retracting mechanism is ok - not super smooth, but for this price what do you expect. It's a nice feature although who knows how reliable it will be. I retract the cord and tuck this in a door pocket.
UPDATE APRIL 2011: The cord has gotten stuck a few times if it's retracted too quickly into the housing. This last time I pulled hard and it released, but the wire was caught and it stripped the rubber casing from the wire. It still works and I've wrapped tape around the wire so it's not bare. In the past I've definitely unplugged this device in case there was some electrical fault. For the money - this works, but it's not the James Bond gadget I'd like it to be. Would I buy another. Probably, but I got my gf a different one for her phone. ----------------
Original review:

This is a must have. I got this for when I use the GPS in the car. The Epic is power hungry and I only use the phone a little. I've also got an extra battery since the Epic has died a few times when I'm away from the car or USB. This retractable cord is tiny, like a thread. The retracting mechanism is ok - not super smooth, but for this price what do you expect. It's a nice feature although who knows how reliable it will be. I retract the cord and tuck this in a door pocket.