I'm still in the "getting a feel for the wheel" stage of the KPA. I've loaded up a bunch of great profile packs and am now playing around with guitars, profiles and songs to see who wants to go where.
While this is certainly not a unique feature among modelers, I'm very much enjoying the ease of use and interplay between Rig Manager, my guitars, and a Cubase session. As most folks doubtless know, an amp can sound jaw-droppingly awesome when you're just standing there playing guitar. And yet, that very same sound can be quite lacking once dropped into the mix.
It's a lot of fun to just lean back, dial in sounds and play guitar. However, the past day or so I've been doing the opposite, auditioning sounds and playing guitar exclusively within the context of a given song I'm working on. Even though I already knew this, it still surprises me how a sound that I was totally in love with playing guitar in isolation just doesn't do it in the mix, while another choice I never would have made with guitar alone is in fact the perfect profile.
Too much fun. 
