No denying that the CC combo is a much better system and has pushed the Novak to the obsolete stage,butI have to say this,on 4s the 4.5 is not a weak system.Even compared to the CC combo.The 6.5, I can imagine, is much weaker.But you cannot generally compare the 2 motors,like what gets done.I'm sure if you had a 4.5 you would see a substantial difference in power.Mine always did great even pushing 47 in my Erevo,on my bashing gears 14/68.I only managed to thermal it once,that was because I pushed it as hard as I could till it did.I don't think anyone could really be unhappy with 47 on 4s,with a stable system,even with the MMM combo.But with whats available today the price would have to drop below 200 for the system for me to consider it a value. BTW my 4.5 is now perfectly happy at home in my Rustler,where it may or may not be better suited .