I like that it's easy for our team of about 30 people, including interns, to use without having to learn new software or train anyone else in how we do things here at my company.
It also has some nice features such as being able to track progress towards goals within each project (which helps us stay focused). The interface could be more intuitive if you're not familiar with using an application designed specifically for managing projects/projects teams. We've been able to keep up easily enough so far by just doing what we normally would have done anyway - but this was something extra to help make sure everything gets taken care of!