My Take
I like the interface. It's fun and engaging. This tool can be a distraction as well though. It all depends on how the teacher chooses to implement. May be difficult for kids to focus on learning and content while sounds are being played so be aware of the sound features. I have also heard of teachers that have their parents connected and hear from the parents right away if a student loses points during the school day. Overall though, teachers and kids love the tool and it has worked well for them.
How I Use It
Use this tool for a way to "manage" your class anywhere there's an Internet connection.