Ron - about trusting the joystick - answer is yes. After a couple hundred hours the intuitive response is working ok, I don't THINK about steering much. High speed control is fine, takes very little stick movement which comes with practice.
Roadrunner - 8th gear plowing - haven't done it. 7th at 17 is about max for me, all gravel roads here, tires throw rocks, windows do break. Steering is stiff when cold and takes about an hour of running time to find "normal", response is modulated in higher gears. So far I have been able to react in time, never have felt like the joystick raised the risk any. A 160H in snow, the thought of that much power, uff da.
Grader4me - happy with the machine - yes, but I'm not a "yippee" kind of guy. If you're looking for a Motor Trend type of review full of gushing praise it won't be written by me. The M grader does all the things most any recent production machine would do, but the controls are all different. I'm 50 years old with enough experience and developed habits to make change a challenge. Some of the things that need to be learned to run the M grader were details I never anticipated, I think over time I'll get there. For instance, cruising to the end of a mile, release throttle, downshift, unlock differential, turn the corner. Then click the button a time or two for upshift, click button on other joystick to lock differential, and my mind prepares for a change in machine momentum (thinking upshift) and I end up leaning forward in the seat, grrr. Another little annoyance is the 4-5 shift, the 5-4 shift is worse - many times that downshift causes me to bump the stick and drop the blade on the left side. So far no combination of throttle / clutch / shift interaction helps, engine at idle is about the best to be had, if stopping click trans to neutral from 5th. Lots of plusses, air ride seat, great visibility, better ladder, ground level fueling, quiet cab, heated mirrors, ventilation system keeps windows fog free, hydraulic noise minimal as pump is no longer under cab, plenty of lights, engine power noticable increase, burns much less fuel than the H model previous, to name a few. The throttle pedal / lock button setup takes some time to master, usually I use Auto mode which has a resume feature similiar to cruise control. Auto mode disables itself if the foot throttle is moved more than 20%, so sometimes when going up a hill I begin to press on the foot pedal which at a certain point releases the throttle lock prior to getting the pedal down to match the original set point resulting in loss of power and a sometimes awkward lurch. The blade slide shims and circle slack adjustment are supposed to be easier but I haven't done either of those yet. Brake system is hydraulic as compared to air on previous models.
Yeah, I suppose I could write a while more but you get the picture, nice machine but not perfect. Don't know if there is or ever will be. So far I have not talked to anyone else with experience running an M doing what I do, so read what I write with a grain of salt, so to speak. Seems like there are a lot of people curious about the M, so I try to pass on some of what I know.