I've been running variations of the Flite for almost 25 years. I have them on all of my bikes from road to BMX to DH. My ass is formed to a Flite. Whenever I test-ride a bike without one, it hurts like hell after a few minutes and some saddles hurt instantly. The only saddle I would consider switching to would be a Brooks, but converting 4 or 5 bikes would be a considerable investment (although I probably wouldn't switch the DH bike).
FWIW, I am searching for a Flite "kevlar" (standard leather Flite with kevlar reinforcement on the rear sides) if anyone has one left over. I have one on my DH bike, but would like to get one for the enduro/trail bike as well. Selle Italia did another run of Flites a couple of years ago, but not the kevlar version.