Tom,
Yes, it's an upgrade to what the sonic maximizer does, but it takes it to a few new levels. The sub output has a dedicated control, and the high end expander really spreads the sound out. It's hard to shut this thing off after you hear the processed signal. It's a drastic improvement......just like the TC Electronics "Finalizer" that I use in my studio. It's SO efficient, you just turn it on - pick a comression ratio, and it does the rest for you. It really spoils you.

The Peavey Kosmos is the coolest "live rig" accessory I've seen in years. I wonder how it would perform in a studio setting? Hmmmmm?