We bought this for my wife's new landscape maintenance business. We haven't put a lot of hours on it yet, but of course it has all the usual expected Kubota attention to detail and robust construction.
We looked hard at the Exmark ZTR before buying the Kubota. In the end I liked the hydraulic deck lift and knob adjustment for cutting height. It's really simple to raise and lower the deck and changing the cutting height is a 3 second operation.
Mower has tons of power with the diesel and is very frugal with fuel. We installed the mulch kit and striping option. Cut quality on wet tall grass is not great but that's due to the mulching baffles/blades rather than the mower. It has tremendous power so on soft wet soil you have to be very careful not to dig up the ground with turning or starting on hills.
The operator station is outstanding, with multiple adjustments for the seat and a very cushy ride.
My only complaint is the blade attachment system seems overly complex compared to other mowers and as a result you need 3 hands to put them back on after sharpening. Since I do that a lot I'm not looking forward to it.