UPDATE: After mowing my 1 acre several times now with the X380 here is an update.
The Good
1. Starts and runs goods, engine is not as smooth as my Kutoba 29hp diesel but fairly smooth for a gas motor, only the occasional pop out the exhaust.
2. The 48" deep deck produces a superior cut vs my 60 inch Kubota deck, its quite a noticeable difference. Looks groomed. I recently cut the lawn without the bagger and noticed the JD cuts the clipping 2-3 times so even in tall grass where I was cutting 4-5 inches of grass off it didn't leave rows of cut grass laying on top of the grass like the Kubota does. After mowing there was very little grass clippings noticeable, no mulch kit required imo.
3. I continue to love the pull/push knob for engaging/disengaging the mower deck.
4. The bagger is awesome in how well it sucks up the grass clipping its like a shop vac.
5. Manual steering and deck lift works quite well, I'm happy I saved $1,000 vs paying for the hydraulic lift and steering.
The Bad
1. The government safety reverse button BS is highly annoying. On my last mow I taped it down with some duck tape wow SO much easier. I will engineer a permanent fix to hold that down.
2. MAJOR design flaw in the deck/bagger. As much as I'm impressed with the bagger system the idiots at JD must know there is a design flaw. So the 48" deck weighs but a fraction of my Kubota 60" fab deck. The JD deck is tippy/bouncy over bumps and because it produces such a groomed cut its quite noticeable when the deck tips and cuts the grass at an angle e.g. it looks like it scalps the grass on one side. The bagger makes this much worse. All the weight of the bagger rests on the right side of the deck. This makes the deck quite tippy indeed. You can easily lift up on the left side of the deck without much effort. So when you hit a bump or even mow on a side slope the deck tilts and does not mow level. So the deck even without the bagger needs some counter springs or something to keep it from tipping so easily on bumps and with the bagger clearly they need to engineer something to take the added weight off the right side of the deck. So great bagger but poorly implemented. I don't think extending the anti-scalp wheels is the answer, you would basically be dragging the deck around on them and its not designed for that.