I've had a B-17 for 2 years now and have logged about 25,000 kms on it.
I've tried a lot of different saddles, but that B-17 is the most comfortable saddle I've ever owned!! And it seems to keep on getting more comfortable the more I ride it.
BTW - it took me about 3 weeks (800 kms) to break it in ... and it broke in rather suddenly in the middle of a 1000K brevet.