I have an old one (40-50ish years old) on one of my bikes, but I had to do a bit of work to get it comfortable (wetting and re-shaping, then leaving out in the sun to dry, followed by an application of Proofide, and then lacing the sides together), and I've been playing with the idea of getting a new one...however, I'm concerned about how long they stay firm. I'm used to some pretty firm saddles, like the Gilles Berthoud Aspin, and it bothers me when the sides of the saddle flare out. They rub on my thighs, and all that. If a new B-72 is likely to start sagging and flaring fairly quickly, I might just stay with this old one as long as I can.