Congrats on your purchase. I have been using Brooks saddle for the last 10 years (after two decades of scoffing them), and I love them. I have always ridden the regular B17, without any cutouts or such, and find it comfortable enough to go on fairly long rides without needing cycling shorts. These saddles can be very hard when new, and will remain hard over the first couple weeks of use. Then they soften up and form to your backside. If you have uneven sit bones or things like that, the B17 will adjust itself to fit. In time they become very comfortable.