Fantastic price for a serious bit of kit!
Other refurb deals here - http://store.apple.com/uk/browse/home/specialdeals/mac
Apple refurb products have always been next to perfect in my experience (I've had a Nano and iPhone in the past) and come with a full 1-year guarantee.
Full Specs -
13.3-inch LED-backlit glossy widescreen display
160GB hard drive
8x SuperDrive (DVD±R DL/DVD±RW/CD-RW)
SD card slot
Built-in 7-hour battery
NVIDIA GeForce 9400M graphics