I've only had my 4400 for a couple of months. I have not had much chance to use it yet due to limited availability to my farm. We just bought 12 acres and have to get a driveway cut through a virtual swamp to not have to cut through my neighbors land. I have used the tractor on a couple of occasions so have an initial feel for how it works.
The tractor seems to have a lot of nice features, but I haven't been able to use any yet. I think this thing sat outside a lot because it shows quite a bit of wear for 1100 hours. Engine starts right up every time. The Category 2 3 pt hitch threw me initially, but now I'm just searching for the best way to hook to my Category 1 implements. Bushings don't always work and its tough to change my plow pins since they are cast in.
This was a very good value for a 64 hp tractor. I won't need many of the features like the foot throttle or the self leveling 3 pt. I just want the front loader, 3 pt hitch and pto to work. I'll come back when I've pushed it a little more.