I love the plug-in! Its unique from others that I've tested in that you do have the option to place it on a page, not only in a post. It provides an extra layout option.
The feed to and from Instagram worked great. I sent a photo from my phone via the Instagram iPhone app to my Instagram account. Although I did have to manually refresh the slide-show web page to see it, it only took about two minutes for the photo to show up in my website slide show!
I gave it 4 rather than 5 stars as its a little light on the settings for display options such as caption placement, text color and spacing, and slide transition type and speed (a slow Fade-In would be nice). Some but not all of these can be tweaked with CSS.
Thanks for the great plug-in!