First off, yes it slows cycle times down. You have fluid going to 4 cylinders instead of just 2. On mine, (Mahindra 7520) it supposedly cuts the lift capacity by some, but no one knew how much. As far as Kubota having an on-off lever for their hydraulic self leveling loader, I sometimes wish that mine had that option. (mine is on all the time, no way to turn it off) It would be nice to have it off when you are using the loader at lower levels. That way when you lift the bucket to say transport height, the bucket does not have to be curled again to keep the material in. Each type of system has it's quirks I suppose, and we get use to them.