This is the first semester I have used Google Classroom. I decided just to jump in, and am using it for all 5 classes I am teaching. In general, I like it. It's simple. There is no learning curve. Students know how to use it immediately. It does not have all the features of other LMS (Learning Management Systems) like Moodle, Blackboard, Schoology, or Canvas. I think that is a positive point, actually. I mean, our school already has a system (SIMAK) for grades, course info, and so on - like most schools do. I just need a simple interface to connect to students and help me stay organized, and Google Classroom seems adequate. And, it's automatically connected to Google apps - Drive, Docs, etc. I still haven't figured out the fine points of assignments. A few things about submitting, reviewing , and returning them seem a little confusing, but I think by mid-semester it will be clear. I'm not sure what my students think . . .