Pros
You set your own hours. Whenever you want to work, just log in. You can meet some great people with very interesting lives. A lot of students (all ages) are really motivated to improve and respond well to constructive corrections. You can connect with other tutors via the facebook page to ask questions, but a lot of basic questions can be answered on their info pages.
Cons
If you are online, but you do not talk to anyone for an hour, you are not paid for that hour. Priority Hours are sometimes unavailable for your preferred time so there is no guarantee you will make what you want or need in a given day. There is always the chance you will answer a call and see genitals. You can ban them immediately, but it doesn't stop them from doing it in the first place.