One thing I enjoy about my Brooks and maybe not previously mentioned, is that they're somewhat slippery, meaning that I can slide my little tuchus (I wish) all over the saddle without grabbing. That's important since just as with my hands on the bars, continuously changing positions prevents blood flow from being restricted to any specify area. Many synthetic saddles are too soft and the top material too sticky for this to be easily done.
Just my take, they work for me but they're definitely not for everyone.