This is one of the best app companies I have ever worked with. Scratch that. Not one of the best, THE best. I never leave reviews (I know.... sorry people) but really in this case I must.
At first I had a few issues with some of the UI and asked if they could help -- and they went so above and beyond with my requests -- usually within minutes. I am so happy with this elegant app and cannot say enough about the responsive and competent customer service.
I'm still working on setting up our gallery, so it's not live in our store yet, but here is a link to it so far so you can see it in action: