Pros: meet new people, set your own hours
Cons: no pay if you don't have anyone to tutor, some students may need special help, the certification meeting are either too late in the evening or interfere with other jobs
Its actually a pretty rewarding position. It allows you to actively utilize your education in the area(s) you tutor. The main problem is compensation. You get paid pretty well, however, that's only if you get students. If you have a good reputation and have been around for a while then it is more probable that you will receive more students.