Hi there.
Personally i find i get more benefit by doing the mind map in the lecture. Lectures are rubbish in that the learning experience can be so passive. MMing helps me to interact with the lecture as i'm constantly thinking where to write everything and how things tie in with each other. I also leave colouring them in to when i do my revision.
MMing really does work, i MMed my entire A-level (english pre-uni exams) chemistry course and seriously aced it.
Cheerio.
nick 
