Good way to communicate with students, but limited
It logistically seems that it would be a great way to get information out to students, to post files they might need, or homework assignments, however unless you are using it every day, students don't regularly check it, and they turn off their notifications so then they aren't getting updates.
How I Use It
I used it mainly to communicate with my Prom Committee. I couldn't get students into having discussion on the site or even posting pictures of ideas for prom. I would post important announcements or when we were having our next meeting and they wouldn't regularly check it. I was very excited to use it, but my students told me they hated using it.