Whether the class is a killer or not is completely dependent on the school. Some people say that the class is really easy. At mine it is considered one of the hardest classes on campus. And let me tell you it was difficult... however, i am really glad that i took it. I am using my ap bio credit from high school, so I did not really learn bio... It pushed me to study harder than I have ever studied. I recommend the class if you feel you don't have a strong foundation in bio, but if you do, then take the class if you think its interesting. I doubt med schools will care what you take unless its something crazy.