Beautiful display, very good design, easy to use, plus quite reliable after 3 weeks of testing, BUT for me to use it:
Needs, in order of priority ->
#1 Ability to show a pleasant, full circle display when user selects a minimum of 36 images (12 photos per row of 3)
#2 Support full, uncropped photo display for source folder containing just portrait orientation images
#3 Ability to display just 1 or 2 photo rows as an option
McSear about 3D Photo Ring - Album Browser