The replies from this company to these reviews tell you all you need to know about the professionalism of this guy.

Robb 100% saved me from organic chemistry. I contacted him a week and a half before my final because i hadn’t done as well on the midterm as i hoped and within that time he increased my quiz scores by nearly double and finished the final with confidence and a good understanding of the subject. If you need to learn organic chemistry from someone who really knows their stuff, Badass tutors is the best place you could go.