I have one of these and its kind of a mixed bag but mostly positive. Downsides are that there will likely never be a 64x driver but it does work with Win 7. Also you will get the best results with a specific firewire card, A SIIG card (paid $47 for mine). I would test firewire functionality first then get card if needed.
Upsides are large number of compressors and eq’s that sound great with no strain on the computer.