It is easy to install and straightforward to use. The result is cool and adequate. Had some minor integration issues with my theme though. The result is responsive in all aspects. I had some break down issues on page widths less than the width of the thumbnail of the gallery.
Issues (I am on IIS 7.5 (win7) with IE10):
1. The plugin's CSS messes up terribly with the CSS of the theme used (I use the "Responsive" theme). I had to completely comment-out a few css rules of the plugin because they altered my theme's CSS (this happened only on the gallery page).
2. The "AI Responsive Gallery Album" statement displayed in the gallery page needs to be more tactful. Better give us an option to change it or completely remove it or integrate the hosting page/post title!
3. Why only 2 columns of thumbs? It's ok if you have a sidebar but what about full-width pages? Thumbs should be layed out according to the availability of space! If there is space for 3 then put three.
Keep up the good work!