Saddles:

"What is good" is very subjective.  Shaping is important for some
riders, while width is the big issue for others, and padding thickness
(or the lack of it) is the important thing for still more.  

I find that I most easily adapt to a new seat whose rear area is
reasonably flat, whose center has a cutout, whose nose is slightly
below the level of the flat area, and whose padding is minimal but not
absent.  But this doesn't describe all of my saddles; there is
variation in the designs which is hard to account for.  I think the
real answer is that you know you've found a good saddle when you get
off the bike after more than 20 miles and have no problem with the
idea of getting back on again."

Durable...but comfortable?