If you order a new one, be sure to ask for the SOFT seat. There seems to be huge differences in the softness.
Funny that they don't mention that on their web site.. They only say that the seat will feel hard but it will break in over time. The Corbin I have is pretty hard. Took some getting used to, but it fits like a glove now, and the backrest is worth it's weight in gold.
Cheers,
Brad