The best things are how easy it was for my students from all over Nigeria to use, how user friendly it was. I can't think of any thing other than not having a mobile version for those who want to work on their phones during classes (but they do offer apps). But honestly i don't dislike anything as such. They need more features like videos tutorials so that our teachers would know exactly what we've been taught in class. It's very helpful for students especially those attending distance education courses.