Pros
I have had the privilege of working with Tutor.com, and I've had a great time there. They gave a great training experience to learn exactly how to work with students, and the Tutor.com software they used for tutoring students was very expressive in communicating with students, which was essential to have a successful tutoring session. Also, it really helps that Tutor.com gives you your own hours to work with, so this is very convenient when it comes to a busy schedule. In short, 1.) Great training program 2.) Easy-to-use tutoring software 3.) Set up your own hours
Cons
On the other hand, I've had difficulty getting students in order to tutor. Some hours, I'm completely open (this is called "floating"), and I would this for hours at a time, with varying success. This instability had me question my financial status more often than not, which was an uncomfortable position to be in. In short, 1.) "Floating tutors" have a consequence leading to unstable income Of course, Tutor.com is a recent program, so the enterprise is still growing.