I bought my 4WD JD770 with agricultural tires new in 1997. It was purchased with the 70 loader, a set of 5 front weights, and a brush cutter. I had the back tires filled with chloride and made a 600 lb 3-point counter weight to use when doing more than trivial dirt moving with the loader.
Since then I've added a a 3 point mounted PTO weed sprayer, a landscape rake and a manure spreader to the list of implements for this tractor.
This tractor has been as reliable as gravity. It always works. It addition to regular maintenance like oil changes and greasing it has only needed a new seat, one new battery cable, two light bulbs, and two batteries in the time I've owned it. I get on it, it starts and runs like new. It has plenty of power for it's size, is easy to drive, and with the added weight in the tires really has some pull for tasks like pulling bushes out of the ground, etc. It will run all day with the brush cutter clearing pastures on a tank of fuel.
I am very pleased with it.