Well I am using Win 8 and now Win 8.1 and have no problem.
I never felt missing the start button. I am using FARR from Xp and got so habituated with it's quick keyboard response to open an application that I forgot 'there is a start button' !
I just prey that FARR works in Win 9, 10,... and I have no qualms with MS.
BTW I take Metro as a bloatware added by MS, just like IE in Win 98. I used Firefox then and ignore Metro now. Win 8.1 helps me here and I never see it.