... it doesn't lag terribly much while you're drawing (unless you significantly increase the size of a brush!) ... but be prepared for the phone to take a good 20 mins to save once you're pushing 3000px with a couple of layers! (And the same amount of time to open the file again!)

@tone ... nope, haven't tried the global pressure settings or new brushes yet ... do they alter the way the wqtercolour brushes work? I kinda liked their pressure settings the way they are ...