8x write is slow by today's standards. There are 40x drives now. This might not matter at all...depends on what you use it for. Burning entire CDs will take much more time (obviously), but to just write a few files on a CD to take somewhere, you don't really need 40x. The new drives won't reach their maximum speed until they've got to the outer part of the disc anyhow.
For the 8x re-write, that's pretty much today's standard. Most drives are 10x RW, some are 12x now I think.
I think the bus powered aspect of it makes it pretty cool. If you don't need super fast burning speeds, I'd go for it.
Brad