It works fairly well. I've been verry happy with it as an alternative to built in laptop sound cards. I doesn't seem to lag the mouse on my 900mhz celery. It does blip every once in a while when you start a program or the computer hangs, which is annoying.

Basicaly, if you've got a desktop replacement laptop, it's a great way to get decent sound out of it. I bought the 5.1 klipsch promedias and was dieing with my laptop sound card. If you've got a desktop, buy a real sound card instead...

Mattew