I ran a Yazoo/Kees ZT max 52" and 23hp Kohler almost all of last season. They are good solid machines, but I never was quite satisfied with the cut quality, had to do double mowings quite a bit. After the dealer and I had a big disagreement I traded it for an 04' grasshopper mid mount and I could tell a big difference in cut quality and speed. Overall they are a solid mower, I put 300hrs on the one I ran, had no mechanical problems, just didn't cut as good as I thought it should.