This is a light and compact DVD writer. Its footprint is not much bigger than a standard CD jewel case and it's as thick as two CD jewel cases stacked upon one another. It's powered by a dual USB cable (i.e. it uses two USB ports), but it also works using just one USB connector. There is an option to add a power adapter (not included) if your PC cannot provide enough power via the USB ports. However, I would suggest that most modern PCs will not require one. It has a spring operated front loading tray and it comes with a copy of Nero 9 Essentials. When connected to my laptop the drivers were automatically downloaded and installed - plug and play simplicity. It plays back video DVDs and CDs and it doesn't overheat.
DVD and CD burning performance with a laptop running MS Vista with 2GB of RAM and using both USBs:
4.7GB of data to DVD+R at x8 speed: 13 minutes.
700MB of data to CD-R at x24 speed: 5 minutes.
My laptop's performance was not affected in any way when the discs were burning.
In summary, this is a small, affordable and fit for purpose DVD writer.