Been using it for a couple months. I think it's the best option on ipad for recording (have garageband as well) however:
I don't care for most of the VSTi (yes I know about audiobus and that's the only good option) and some of the workflow doesn't work for me (like midi, I don't like how the editing works).
However it's a pretty impressive daw for on the go. I would prefer a different audio interface personally (I have an alesis i/o dock) to get it a bit more portable.