I'm happy with mine. It sits at zero all the time. I suggest you upload the latest firmware. It seemed to integrate and behave better after I did that with mine. 
You can use ACT to program some of the buttons. 
I am still adapting to it but I think the best way to manage with it is by using the faderport in conjunction with your keyboard and mouse.

Ianj,
 
I don't understand how to use the ACT feature.  Can you help me with that? I've read the manual, but I still don't get it.

azslow3
 
Put it into "MCU" mode and use "MackieControl" plug-in in Sonar. If after double checking In/Out are set correctly and the device is in MCU mode you still get "Connecting..." form MackieControl, you will need my mod of it.
 

What and where is the "MackieControl plug-in" in Sonar? I have a keyboard controller that I've long ago given up any hope of working with Sonar. I cannot get Sonar to map ANY of the keyboard's buttons/faders/knobs, etc. The keyboard does have a "MCU" mode, however.