From TFA

> import doesn't play nicely with compositors; making effects like transparent windows not render properly in the screenshot. maim, like scrot, uses imlib2 which isn't inflicted with this problem.

> maim can actually take screenshots with your cursor included in them! It does this using the XFixes extension. I don't think there's any other screenshooters that do this.

> For those of you with multiple monitors, maim is aware of which pixels are visible or not and will make off-screen pixels that are in screenshots black and transparent. Import and scrot both mindlessly include off-screen pixel data in their screenshots which is very often just garbage.

Well I'll be damned. ImageMagick is like ffmpeg, every time you think of something that needs doing, it's already been done, but you never think to look for it.

This is also what I use on a daily basis. One case where it falls through is where you are trying to capture a screenshot for something that has a certain UI state, like a mouseover. For those cases you can have PrintScreen set to capture your desktop and save it to a file. In OpenBox you would set up a key binding for Print that executes: import -window root filename.png

That's what I use most of the time. scrot is nice too.