I bought this Coby charger because the two "Coby 4 GB Video MP3 Player with FM Radio (Blue)" I recently bought for my son and myself did not come with one. I find it easier to charge items with the house electricity instead of the computer. That it can charge both of our mp3 players at the same time is nifty, too.
We've only had the charger a few days, but it does not get warm when it is plugged in. That was a relief to me because I had, at one time in the past, another brand's USB wall charger that would get extremely hot, which I'm assuming was not a safe thing to be happening.
The plug prongs fold down when unplugged, and that is nice if ever I need to travel with it, or lay it in a drawer.
UPDATE: 05/13/2012 -- I've now had this product over a year. It is used several times a week and is working great, still.
UPDATE: 04/23/2013 -- I've had this charger for about 2 years now, and it is still working great. Because some friends with Kindle Fires have asked me this, I'd like to add, that while you can use this charger to charge your Kindle Fires, please remember that this product's output is 5V, 1A; -- it will be a slow charge, and maybe take longer than you were hoping for. If you are wanting to buy a charger exclusively for the Kindle Fire or Kindle Fire HD, look for one with AT LEAST an output of 5V, 1.8A, such as the Amazon Kindle PowerFast Charger for Accelerated Charging