How I Use It
I would use it for exit and entrance tickets--requiring that students respond to a given prompt and/or reflecting on the day's lesson. I have yet to use it with my students, so their response is yet to be determined.
I like this teaching tool as yet another option for encouraging all students to participate in writing. I like its ease of use for posting. My concern is that students may respond inappropriately, where they may be able to post before I would have an opportunity to review their writing. My suggestion is allowing for a tool for teachers to be able to proof students' submissions before posting.