I recently got a B17 in trade and it was partially broken in. I had to raise the tip quite a bit to get past that sliding forward feeling. To quote another thread, someone suggested something like this: "raise the tip until you think it's way too high, then raise it again." I agree that puts some pressure on your soft spots, but I found a nice compromise, and I quickly came to like the natural flex of the Brooks leather, more than the padding in a modern saddle.

Another thing about the Brooks is that because of the metal rail in back, there is less saddle to sit on comfortably, less of a sweet-spot, if you will. So I needed a setback setpost seatpost (30mm) to make it work on my road bike. However, it just barely fit (fore/aft) my touring bike with its more upright posture.

I like the B17 so much I bought a new one (in honey) and in comparison, it's hard as a rock. I know I've got some dues to pay breaking in the new one.