It works great. The ONLY problem is, well actually there are two problems....
1) The adapter I use now, is the one square piece so it's small, http://store.apple.com/us/product/MD823 ... in-adapter
It leaves the iPad sticking a small amount out from the upright shelf it slides onto. It's not the most secure fit and sometimes 2) when I get to banging around on the apps with virtual drum pads, it disconnects so you have to be a little delicate. When it disconnects, the iPad switches to its internal speakers and the replugging it in, does not reset and start using the synthstation audio outs. You have to close the app and restart it.
That's why I want an actual dock- for a more secure fit. This IS functional, just not optimal. I would NEVER gig with this solution EVER. There are ones like this, with a short cable between that might work better since there will be wiggle room...
But again, it wouldn't be a snug fit to the synthstation.
3) My newly added 3 complaint is, the synthstaion isn't any more compatible with AKAI apps than other controllers.
WHAT?!!!! You'd think knobs and sliders would have some kind of function in the iMPC, but no. The drum pads trigger but in a seemingly random (MPC users know about this) assignment and is NOT Mapped to the iMPC software. You can MIDI-Learn, but it's note-by-note, which doesn't make sense for a KEYBOARD sold by the same company that makes the DAMN APP! Maybe some future update will enhance the experience, but for now, it's lacking.