Sometimes I notice that KM "seems" like it has the most effective moves taken out of different practices and focuses on them. I also think it depends on the instructor, I have an instructor who is younger then me ( I'm 24 ) but he has a black belt in TKD so he incorporates a few of the TKD techniques into our KM class
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Tae Kwan Do, Ju Jitsu, Muay Thai, and now Krav Maga