Some great features, but also really needs some vital additions:
-One currently cannot import icons (folders) made with IconBuilder Pro. Old image files of icons are long gone, so only option is to import folder icon images, which DMGA won't let me do (I installed Apple's Icon Composer to remedy this, this did not work).
-Also had a similar problem: I tried to copy+paste icons from these same folders onto the opened .dmg and unopened .dmg files (via command+I), and I cannot. The icons are somehow locked, and I can't unlock them. Really irritating. Why I can't change them, I don't know.
-Image was successfully imported into the background, but when .dmg file is saved and opened, the window is slightly smaller than the image inside it. I could not re-save the folder size to exactly match size of imported image. One out of ten tries (approximately) this doesn't happen, the image and window display successfully. But one out of ten isn't exactly a good track record.
Overall the dev has made a very stable app with some very good features - but it's the missing features that really hobble this app to the point where the customizing of the overall .dmg folder/file is very limited. If users really wanted to be limited to a very restrictive set of features, then it would be fine. If the dev expanded the individual customization features more it would be well worth the price. Currently it is not.