I like how easy it was to set up my account, as well as all of their helpful customer support! It's really great that they have so many different features for employees/employers alike - this makes things easier when you're trying something new or need help with an existing feature (like scheduling).
They also offer some free trial periods which are nice if your unsure about whether or not what would work best in terms of functionality & ease of use before committing full time funds into software purchase decisions :).