I downloaded the plugin in 30 seconds and spent another 60 seconds updating the settings to my choosing. Works like a charm! I look forward to adjusting the css slightly to change the hover colors to match my blog, but the pure functionality works great!
I would love to have the ability to count the reactions at the top of each post easily (from within the settings or with a quick tut for the layman). I found feedback from the author on a forum that provided potential php code, but can't figure out how to merge that with Disqus comment counting so that they are on the same line. The Disqus "reactions" don't work on my blog (and many others that use the jetpack).