Review (5/5): I'm using it for my laptop keyboard which works fine.  Deep keyboards are still out of its reach.
I saw in the recommendation they mentioned keyboards so I decided to check this one out. My laptop keyboard is not very deep and it works great for it. My other external keyboard is a bit deeper and it wont get the very deep stuff. But thats what spray dusters are for.
It also works on the table after my GF uses the nail drill thing. The bottom is actually some brushes to shake stuff up so it can be vacuumed.
Pretty cool little machine. I still use a damp towel after both for the very small things that it misses.