Well mowed with the F for 3 hours yesterday, after reducing air in tires to around 14lbs, it was a much better ride. Ride much better than zd326. My biggest problem is when mowing ditches I don't gouge the other bank of the ditch. With this F you will just plow through the ground if the angle is just right, but I will work that out. I know John and others talk about not getting grass on them with the rd mower (I would of had to buy a bigger trailer for the 1 inch extra width), it wasn't too bad on grass clippings. The biggest thing is there isn't much grass on the deck when done, ZD always had grass all over it. Now with all of this said about the F and the improvements over the ZD, I will also say the ZD provided excellent service to me for over 6 years. It did what I asked of it with no issues at all. I just had the opportunity to move up in the mowing class and I did. I should be keeping this F for a very long time. All is well.