Found it a bit annoying so far. The tutorial really poorly thought through. It often says stuff like "touch the spell button, then do this" without giving any indication which button that is - which makes you wonder what the point of a TUTORIAL is. Some of them have fairly cryptic icons on them and it's not obvious what they do at first. I found it overall to be more confusing than helpful. It smacks of being written by someone who knows the game inside out and hasn't really bothered to consider what someone coming to it new might NOT know.
Also the touch precision and responsiveness is some of the worst I've ever seen in a game. Sometimes it fails to respond at all to a quick tap, and sometimes the cursor doesn't appear where you think it will when you tap.
On the other hand, the graphics don't look as bad as I expected, and it's a generally enjoyable story, so if they can fix the UI a bit, it should be worth a try.