we operate 737 -400 and 800 and the use of autobrake for RTO and landing is standard ops on both. The autobrake gives a programmed rate of deceleration and most people use a dry setting of 2 on a classic and 3 on the 800. We also use full reverse thrust which provides a deceleration rate equal to that of the autobrakes at touchdown so the autobrakes aren't actually braking until around the 100 - 90 knot speed. If you leave the autobrakes in too long then you have to apply brake pedal pressure in excess of that being applied by the autobrakes which can give you that lurching/whiplash feeling forward in your straps. So when I am happy with the touchdown and rollout I disconnect the autobrakes at around 90 and keep the pressure on the pedals as manual braking. We have the pilot not flying announce the " autobrakes disarm" light as standard.