I've recently switched over from a B17 Imperial to a Flyer so have no experience of the regular B17. However, I immediately saw the advantages of the Flyer over the Imperial as being generally more comfortable and also less tiring. I ride a Disc Trucker with the bars a couple of centimeters above the seat level and mostly ride on paths and trails. I've found that apart from the absorption of small shocks - which, accumulated, created soreness over about 20 miles, the Flyer also meant I was needing to lift out of the saddle a lot less. This has resulted in getting a few more miles out of my legs and being in better shape the next day. I weigh 175 lbs. So far the Flyer only has just over 100 miles on it but they were far more enjoyable miles that the ones on the Imperial. For some reason (perhaps related to riding position) I also experience less numbness from the Flyer than the Imperial. I hope that's of use to you.