Are JHU CTY Programs Any Worth?

I have planned to take an Advanced Robotics course at JHU, after passing the JHU exams. I want to know if this course is worth because I am wondering whether I should stay another 3 weeks to delved into the topics of Chemistry. This can help me because I am going to be taking Chemistry next year, and it would be good to have a jump start. However, the money priced for these courses are a lot. Also, I am taking an online session in Topics in Java, which is costly.

Would love to know if I should take Chemistry at JHU CTY, this is mainly for preparation for the next year.