I have fond memories of this series, but awhile I watched a couple of first season episodes and I was somewhat underwhelmed. Sure your perspectives and tastes can change over so many years, but something felt off.
The first season was decent, aside from the gross sexism and the persistent racism toward non-Western cultures. The second season was a mess, and I've heard such awful things about the third that I haven't dared watch it yet. All in all, I'd call TMFU my least favorite of the '60s spy shows I've seen.
The sexism was so overt it was rather weird (for those who keep lobbing that charge at TOS).
The charge was often warranted for TOS, but at least it made an effort to be progressive. TMFU's sexism -- in fact, its blatant misogyny -- was far worse.
The real weirdness is that the most misogynistic episodes were usually written by Peter Allan Fields -- who later went on to do great work writing Kira and Dax as strong, admirable female characters on
Star Trek: Deep Space Nine. So clearly his view of women changed for the better in the interim.