I'm on my second 9960. The first one had issues with wiring. I would shut off the tractor and it would not restart. It didn't have any power.
The second one has power take-off shaft issues. I already broke 2 power take-off shafts. The dealer says the problem was with Cutter. I bought another Cutter and still have the same vibration issues. Now they want to check the tractor again.
I have owned a total of 5 different Kubotas. All were good tractors. I traded up in size in time as I got more land. This 9960 is not the reliable Kubota that I expected.