no major problems at all. I have put 470 hrs on it this year and all I have had to replace was a strut bolt, because it vibrated loose and made one side of my deck hit the dirt. Luckily its got those little chains holding it up.
Its just like a commercial mower, but its like a hybrid between homeowner and commercial. I was only out of 5 grand on it too.
The mow quality is amazing too. I have had an exmark lazer and I would rather have the gravely than that anyday!