Great way to collect ideas from the class or a group.
Overall, I think this would be a great to use as a formative assessment tool. It like how easy it is to set-up and manage as a teacher. I can save each of the sessions and view the results in graph form. I think the students will enjoy being able to share their thoughts in an interactive, non-threatening manner. It is a simple way to integrate technology and encourage students to critique the reasoning of others and defend their arguments with reasoning. Both of these are skills are part of Common Core Math and Next Generation Science Standards and Practices.
How I Use It
I would use this product when I wanted to gather student ideas about a topic. I might also use it to start a discussion about something that could be controversial. I loved that besides simply voting for an idea, students can add their own and add an argument for or against the topic. Students could be asked to defend their opinions and support or refute those of others. It was very easy to give students access via email, Facebook, Twitter, or by posting the link. It worked well on mobile devices making it even easier for all students to contribute. The group also liked the prize component.