Pros:
Very necessary for screen recordings.
Cons:
For screenshots, this is unnecessary. When I'm on Windows, I just use the good ol trusty Snipping tool which lets me crop exactly what I want.
Suggestions:
Create an app for ios and android which crops out the notification strip at the top -- sometimes you post screenshots from your mobile and you don't want everyone to see which apps you're running (could be a security risk or people know you're not on VPN etc)
RE: CleanShot - Capture your screen without all that mess on your desktop