I mowed for the third time with it today. Start to finish including a little trimming and clean up with the blower was 1:45. And I go it stuck and spent 10 minutes or so opening the bypass valves and pulling it out with the tractor. I tried to mow an area that's usually to wet but thought it was dry enough. Probably would have been had I not tried to turn around.
I'm getting pretty good with it. My biggest remaining issue is tire spin on turns. Next is remembering I don't need a death grip on the controls. I do remember when my hands start getting numb. Once I get my patterns down I think I can easily get to 1:30 with the cleanup and some trimming.
A nice surprise is how much nicer it mows. The lawn looks flatter and I don't get wind rows in the thick areas. My yard has never looked better. Almost makes me want to spray for weeds. Almost.