Actually, one hour in coach could be brutal. It depends.
That's the problem -- you never know what you'll encounter until you sit down.

I've had a short flight from PHX on a sardine can in a window seat with my head bumping against the curvature of the cabin. Then there was the 60-year old woman next to me with shoulders so broad they'd make an NFL linebacker blanch. And then there was the young buck who fidgeted endlessly, turning, twisting, sniffing, pulling out magazines, putting them back, reaching under his seat, reaching under your seat, fidgeting some more . . .

For those like me without wide bodies, a FC seat is more of an insurance policy than a luxury.