I tried them for about 3 months, was not a bad service. I had some issues with the methods in which they allowed for navigation of photos and how easy (or hard) it was to find a specific photo in a large collection. I ended up going back to Flickr. That being said, the display UI was great and I had hoped to see them pressuring other sites in the same space. Good luck to the team in whatever they decide to work on next.