My Students took the Kahoot Challenge and created their own test reviews. They worked with a partner, and then had three groups check their Kahoots.
Each group presented while the class played, and we had a lot of fun reviewing for a chapter test. Kahoot Link. Kahoot attended ISTE 2016, and their webpage features some useful articles.
I say the proof is in my classroom with my students. This is an active-engagement tool that is both fun and motivating, and students can also use their own creativity to designing their own Kahoots. My classroom video tries to capture it!