Now that the MMM combo is available it's definitly the better system.But I refuse to let a blasphimous statement like that go uncommented on. :) I ran my 4.5 for months with no problems,and never overheated it,even in the summer at 100*.It ran 47 mph.Now maybe I have the exception motor to the rule,and my buddy did fry the esc,but 45 is doable no problem.