In a word: EXCELLENT. For 15 years now I've used my JD primarily for mowing 2.5 acres and plowing a 250 ft driveway. We get some big snow up here and it's never once bogged down or let me down under any circumstance.
I use an 18 CF utility cart to move tons of dirt, rocks, and logs. Also drag a DR lawn vac around in the fall. Up and down hills, and it just keeps running.
Change the oil and filters twice a year and it's never once had to go in the shop. The limited hydraulics have been flawless.
Have always wanted to upgrade to something a bit bigger, but can not justify getting rid of this machine. It'll probably outlast me!