Sometimes, I swear I get lag on the touchscreen, though, because I'll be swiping at a knob over and over, trying to be as gentle and precise as I can (Ok, so not exactly swiping then, but... my backspace key is on strike today), and then randomly it'll work on the 12th try.
Also, while the touchscreen editing is fun and fresh, creating complex sequences can feel a bit like keyhole surgery.
I'm quite enjoying the keyboard interfaces. Much easier to play than the Volcas.
I managed to get 5 gadgets running before I started to notice dropouts. I'm now interested in integrating the iPad into my computer DAW via MIDI and audio, if that's possible. But even without this ability, what a great lot of fun you can have!
I feel dirty.