I know in some training circles some people see him as harsh in his methods (TV editing doesn't help).
I think his methods work well, but for those who are less forceful a few of the techniques could get them into trouble with an adult dog that has been allowed to get too high an opinion of itself.
I think a NILIF
Nothing in Life is Free program initially would be safer as it is non confrontational. the owner then gains confidence and is more able to then become a more effective leader as Milan advocates.