I installed my first Brooks B17 saddle a few days ago and took my first ride on it yesterday after work. I had already treated with Proofide when I received it before I put it on the bike along with the Brooks Microfiber bar tape. I did just under 20 miles due to time constraints, and took a wrench with me to adjust the saddle on the seatpost if needed. I had to make one slight adjustment, but I found the saddle comfortable out of the box. Of course, I'm 225 pounds, so I may have helped it flex and start the break in process quicker than some of you lightweight guys! Apart from the comfort, I think it really looks sharp on the '76 Motobecane Grand Touring.
Cheers.