Okie, I've got a TT75A and so far I love it. Gutty, tough, plenty of power. I'd say my only gripe so far is that it's a little slow starting when it's freezing. (tight tolerances nowadays).
I've bought but not yet installed a block heater.
I've owned a dozen tractors and I really, really like this beast.
It's got a few real cheap and crappy details like the decals, but when it comes to pulling a batwing through fescue, it never even hiccups.