I ran it around the house for a couple of hours last night. I think I'm going to like it. It seems to handle steep hills better than the GH218. I ran it in some grass that hasn't been mowed in three weeks and has recieved lots of rain. As long as I backed off the speed a little it left a perfect cut. With the 218 I'd have to go slow and make two passes to get a comparable cut. In grass that had been mowed about a week ago I could mow it just as fast as I could stand to ride the mower. Kind of bumpy around here. It left a perfect cut there too. The 218 has the 321D beat in the striping department. The old mower would stripe pretty good. The new duramax deck doesn't leave much of a stripe. I had heard that the diesel would be way louder than the old gas mower. I can't tell much difference myself. I alway wear Work Tunes. Which brings up another thing. The adjustable cup holder makes a great place to store the work tunes between yards. I adjusted the cup holder all the way out and it seems to hold the Work Tunes pretty securely.