Dude, awesome! The expansion of mechanics from the first Sonny is apparent from the very start, with classes that actually come with a noticable difference in terms of abilities instead of just starter attributes. There's now a class for everybody, whether your niche be dealing direct damage, or opening up the opprotunity for allies to finish what you start. The world itself is now even bigger than before, and the enemies are just as unique.
I'd also like to say that it was well worth the wait for this transition from Armor Games to Newgrounds. The game runs a bit faster now, and the addition of achievements is a nice touch. All in all, totally awesome.
Now to go play the original Sonny to catch up, and then go straight into Sonny 2 for even more PWN.