Terrible!

The app sits in the menu bar, which is not my favorite thing in the world, but more importantly, you can’t drag and drop. When you try to drag and drop to, say, a Facebook Messenger window, it just copies the gif to the clipboard. When you paste it, it pastes as a static image. If you’re just going to use it for iMessages, I guess it’s okay, but otherwise, it’s useless.

ShutterChick.com about GIF Keyboard