I took summer Ochem. It was pretty brutal, at the time. Looking bad now from MS1, I only wish I could have the lax summer of full time work while ochem in 10 weeks and starting a new relationship with the gorgeous woman I would later marry.
I would say, go for it if you feel that you have strong study skills and a bit of a GPA buffer.(i.e. don't take it if you NEED an A or if a B would be incredibly detrimental.)
Also, it would serve as a good 'gut check'. If you are miserable during a summer Ochem class, I would really give some hard thought to the idea of medical school. By that I mean; if you hate life by taking 6 credits of 300 level material in 10 weeks, you will def not like taking 32 credits of 500 and 600 level material at roughly the same rate.
Good luck!