Pros
You can work from home, and you don't usually get more than 5 hr of work a week so if you're looking for a very small part time job then it's for you.
Cons
I didn't get paid very much. You can only sign up for 5 hours a week, 6 if you are with them for several months. I was with them for abut 7. You can add on hours after the initial sign up but getting more than 7 is almost impossible. You can't really set your schedule. They're also very picky about background noise, how you talk to students, etc. I had one student calling me dumb and an idiot and some other unsavory words and when I said "that's rude" I got a warning for disrespecting the student. Thought it would be nice additional income while I stayed home with my new born baby but left because it wasn't worth the hassle. I was lucky to make a little over $130 a month.