Students like poll everywhere because it is an anonymous way to answer questions and see what others think.
I like it because it allows me to see when students understand a concept. I also use it to poll the students on current events and issues with teenagers that they would not normally discuss openly in class.
How I Use It
I don't use it as a teaching tool but more as a review tool. I like that it is quick and easy and allows students to use technology in my classroom. They can answer a question without fear of being counted wrong or pointed out in class.