Easy to use. Wouldnt use anything but the blank- other templates confuse the usabilty and add no value.
1) allow user to shrink photos smaller than slide. May want to add captions along side... Not superimposed on top.
2) allow user to choose slide transition time. Goes to fast if including captioning.
3) should have an effect option for just ken burns and fade rather than just the cross fade (closest alternative)
TheSaint1974 about Stitch: Greeting cards in motion