I did light reading here and there for 2 weeks followed by daily (full-days) for 2 weeks. I think it was more than enough, maybe even over-kill. I also wrote the MCCQE on the first day that you could write it. Better to get it done and out of the way. I didn't understand my friends who wanted to study an extra 2 weeks. The exam, as you will see, is very ambiguous, like the questions are poorly worded. It's nothing like the USMLE. Basically, more studying isn't going to help.