I bought the Lightscribe version of this elsewhere about 7-8 months ago to go with a new Netbook, and paid slightly more than at Amazon. It has not been used too often, but has successfully written several CDs and DVDs. I wanted the version being sold here, but it was not in stock at that time. It is very slim, light and does not need an external power supply unlike some others. It does however came with a power lead, one end of which plugs into a small socket at the rear of the drive and the other into an unused USB 2.0 socket. Personally, I haven't yet needed it, as the drive works perfectly without it on my Netbook, laptop and desktop. Both this and the normal USB 2.0 lead are both relatively short, about half a metre in length, and a USB 2.0 extension lead might be useful if you can get one.
If you need Lightscribe, opt for this if you can find it, but in my experience labelling via Lightscribe is slow, around 8 minutes for even the simplest text labels, and more than 30 minutes for complex ones. Added to the premium price of, and relative difficulty in finding, Lightscribe discs it can prove expensive and time consuming if used often.