What I like best about Piazza is its simplicity and its ability to establish effective communication between students and instructors
I was actually rather surprised at how useful my calculus students found it. I am very pleased. I will certainly use Piazza in my future courses.
I love using Piazza for answering student questions; the user interface is unbelievably nicer than anything else I've seen. It is easy to enter text and easy to see what questions need answering; It is just easy to use.
Instructors can create a Piazza for their class with a single click.
Students and instructors are automatically enrolled with appropriate roles, based on the course roster.
When clicking on Piazza in Blackboard, users are automatically signed in to Piazza, so there's no need to remember a separate user name and password.