I own few synths and drum machines, most of them communicate via good old midi DIN (some have humming ground loops while used via midi USB, and some don't have USB at all). The unit is easy to plug and play with Ableton, and USB hub is very handy as well.
Not a whole 5 star because of the not very useful rack ears improvisation that comes with the unit. It's an external pair of ears, fits well on the sides of the unit but meant to be hold in place using double side stickers (supplied in the box). Will simply not hold... I've used some duct tape to attach to unit, and it's in the non visible side of rack so I'll live with that.