I think Ink/Filepicker is pretty awesome and I set up a demo recently of a user submitted gallery in under an an hour. The one thing I don't like is that the Image URLs are supplied only as filepicker.io/api/(your-image). It makes sense when processing images to crop etc but if I store URLs in my application, I want to store them with the real URL, not get locked in to Ink/Filepicker. I can't find anything in their documentation that allows that. It's the only thing really preventing me from fully integrating with one of my projects right now.