I use this a lot, it simple yet I can draw great things from the tools...but there are some problems with the new update.
1) When ever I zoom out of the picture frame to do something or just did it on accident, it would exit to the gallery. The worst thing about this is if I made a huge mistake or if I clear my drawing on accident, I could easily (which I did multiple times) zoom out too much and ruin everything.
2) In the old update I would get only a few marks when I zoomed in and out, but now with the new update it would leave a mark almost every time I would zoom. This is very annoying and I would really appreciate it if this could be fixed.
3) There is no warning when you press the trash can at the top left corner of your drawing in the gallery. This made me lose one of my first drawings and though I was not the best I do miss it.
Those are the main problems but overall this app is easily to use and has good tools. If you do buy this app I would just be careful with what I do and watch out if you make marks.
IITubbsloveII about Sketch Pad - My Drawing Board, v3.0