We have a MTX135 with 4500hrs.  Owned since new, no real troubles but I wish it was a CaseIH.  Iveco engine has been trouble free, "emissionized" injector pump has been problematic.  Replaced at around 3000hrs.  Powershift switch and trans speed sensor have been replaced twice each.  Can't really complain, not our favorite tractor but it has always got the job done.  Decent cheap tractors, I would buy another one if the the price was right.