A new Brooks has a hard convex surface and your sit bones slide all over it. The break-in period will put 2 dimples in the correct position. This is best done by frequent short rides over a few weeks. I was dissapopinted by my Brooks at first, but persevered and after a few weeks it bedded in to conform to my own particular shape.
As other people have said, just apply a light coat of Brooks Proofhide to the top and bottom, nothing more.