My Take
Kahoot is fun with time based points system encourages students to respond quickly. However with only 4 choices available for students to respond to, this provides limited extension opportunity for advanced learners.
How I Use It
Quick quiz to finish lessons as a summary of concepts practiced during the lesson. I have found these quizzes easy to find and set up for the students. Students can lose interest after around 15 minutes, so I would suggest setting a maximum of 20 questions.