Well 1000 miles on the 90D and fingers crossed, no significant problems. Auto steer works well, but I noticed it can be a little jerky on curves - not horrible, but not totally smooth. Today I decided to try out steering set at the comfort level. I don't think it's my imagination, as I was not expecting it, but auto steering with this setting ( vs standard ) seems to be much smoother both on initialization and on curves. Has anyone else noticed this effect?