Hi. I actually bought a bunch of these iPad apps to control SONAR (V-Control and the AC-7 "package" one night after a few too many beers), but I have yet not tried a single one. I went so far as to install rtpMIDI, and there it stopped as I felt a little overwhelmed as to what to try next. I also need an iPad holder for my mic stand (excuses, excuses

). But I will check this thread later to (hopefully get some advice / feedback as well as) see how things works out for you. (Rant over)
All the best.