• usability8
• Stability1
• Installation10
• Functionality7
• Appearance8

The paintbrush program is great as far as basic editing goes, but two major bugs have turned me away from this program. 1) The program crashes during certain copy+paste activities. You are trying to copy from one image to another, make sure the first image is deselected before you click paste otherwise the program will crash and any unsaved progress will be lost. 2) The undo function sometimes undoes more than just the last activity depending on whether your undoing text, copied images, drawings, etc. There's no way to tell. If they can fix these issues, then the program will be pretty good. Until then, the frustrations of losing work are far from worth the download.