Pros
Tutor.com gives you the chance to work with mentors who will guide you on the path to becoming a better tutor, while developing your own personal style. The scheduling is totally flexible and the pay is decent considering you can get in with virtually zero experience, and there's a really decent promotion schedule. Setting your own schedule and being able to work almost whenever you want is a really nice feature.
Kontras
The job has a few downsides - the pay for concurrent sessions is less than it should be, hours can be difficult to find sometimes (your personal availability schedule does not always match peak student schedule), and connecting with students long-term to give them the real, individualized help they need is all but impossible because of the anonymous, randomly-assigned nature of the sessions.