Since u sold your M11 FHSS-2 to get this MX3X w/c has FHSS-3 although that's a downgrade in terms of model but an upgrade in terms of R/C system , so did you feel any difference between FHSS-2 & FHSS-3? is the FHSS-3 noticably faster response than FHSS-2?
I sold a basically brand new M11 FHSS-2 to get MX-3X. No, I can not feel or see the difference in speed. I think that is left up to the computers and marketing. The MX-3X feels great in my hand and has all the features "I need" to race at club level. I've had the majority of high end radios, but I never used more than 10% of their potential. There is not a big difference in realistic speed from the $99 2.4ghz to the $499 2.4ghz radios. Buy what you like and have fun. Hope this helps.