I chose the picture below because it's reflects my current mood well.
Picapp's very simple to use but unfortunately that doesn't mean that customers will find it easy to use. If the images are free to use then it would be good to use the images in the Lib instead of just using any old images and pretending that they are rights free.
Oh, I just remembered something. The search interface on Picapp is lousy, so nix to that I'll stick with Google images for now.