I grew up with these tractors on a 150 acre farm in upstate New York. We stressed those suckers to their braking point mowing, raking, haying, planting, hauling wood and liquids and they kept giving. Nowadays, I use one to plow my 1/2 mile long driveway in the winter and mow my fields.
It is essentially bulletproof and very easy to work on. Parts are readily available from many suppliers.
I found this 1951 non-running in an old barn. I bought it as a parts tractor for my 1948 but I brought it home and rewired it (should be 6V positive ground and the previous owner had someone rewire it incorrectly) and haven't looked back since.
I've been steadily restoring the tin and reconditioning the engine. It is simple to diagnose problems and simple to operate. It has adequate power for a number of jobs including plowing, mowing (5' brush hog, 6' flail and 7' cutter bar), and box scraping.
If you like to putter, these tractors are for you. If you want a powerful workhorse, look to a larger older tractor or a modern diesel.