Pretty neat! I plugged in my rocksmith cable and it just works. One thing though, it needs some kind of calibration. The tiniest bit of string noise and the lessons shoot off without me, even when I have my strings muted.
Yes it does work with the Rocksmith cable and we've seen a bunch of users discovering that. As you point out, pitch detection can be a little sensitive with that cable (depending on the guitar), and you're right that we could / should do some calibrating to improve it.