I love the endless canvas, with the different backgrounds. The app uses the very same tool palette than iOS apps, with a bonus feature that taping with two fingers cancels the last operation! super useful. I'm aware of one bug where the tool palette disappears (rarely). The fix is to go to the main menu and open the canvas again... not a big deal. One thing I find missing is applying the canvas transformations (zoom and translations) to the grid as well.