So I did my second full mow with my tow behind flail. One from Betstco, 59 inch.
As an anecdote, muffler fell of it in about an hour of mowing. Of course, all nuts got lost in action, so I rummaged through my garage and found some. Was more of laughter, than real problem, hope that's the last one.
I let grass grow for 2 weeks, so for me, it was tall. I normally mowed every weekend before, as even my ZTR will choke on taller grass.
This thing does not care. It went through grass like it was not there. Also, because of wetland, it went through puddles and mud with the same attitude.
On upper, flattier of my property, mow is very nice. Looks like table.
On lower, very bumpy/hillocky tier, not so nice, as mower moves up and down with terrain. So it's a bit patchy, but still more than passable for wetland.
Overall, I am very pleased with it and am selling my ZTR. Also, saved me about 1.5 hr of mowing, as I went 8-10mph, while in ZTR, lower tier, I creep painfully maybe a mile or 2 per hr.
That's good news.
Bad news: it's all hard to maneuver, of course. I have couple very tight corners, so I could not go all the way to the fence or turn around, with SxS and mower length. So some patches left, and boarders, I had to comb with my 'ol faithful Craftsman riding mower, what added another 40 min to the job. Next, mower is thirsty. Gas tank lasts about 2 hrs. Though I could never tell how well it is filled as there is no gauge.
Actually, found that it was shipped with battery, connected it yesterday, it cranks and starts right away.
Another anecdotal part - there's lots of parts on the engine stamped Made in Japan.
So if you have large open field to mow, without crooked turns and tight spots - that thing rules. Or, harsh terrain, puddles, shrubs - same, it does not care, munches thorugh everything.