I haven't used a project mix myself, I use a Mackie MCU that uses Mackie control.
I have one and it works flawlessly. The project mix is pretty old so im not sure you will get drivers for the hardware section (pre amps, exc) I could be wrong on that but unless you use a generic driver.
The midi part of it, not sure really. I haven't used one. But I do know Mackie control are in the same price range.
I bought mine used on Craigslist for 175.00 USA dollars.
And oh my G has it made my life easier. The Mackie protocol that comes with Sonar is built for it, so you wont have any problems at all.