Works great on most pages .. But you have to remember to disable this if you like watching youtube videos in fullscreen mode (else you just get a blank screen).

Does what it says, it inverts images witch I wish it didn't, it will also be disable when typing.

It's a good idea, but it makes all the images look like negatives. It needs separate toggles for images and backgrounds. Until then, I'm better off using the other add-ons.