Yesterday I went to mow a one acre yard that had not been mowed in 13 days, all bahai and all over knee high. I had taken the muclh kit off the 737 and installed razor sharp medim lift blades. The exmark also had brand new blades. I started with the exmark and it left stalks, a lot of them. After having to double cut the front yard I said the heck with this. I got on the 737 and mowed and there was not one stalk missed. I will say that on short thick grass like St. Aug., centipede or bermuda the lazer z leaves an excellent "clean shaven look" and the 737 is a little more ragged looking. It just depends on what part of the country you are in what machine works best for you. I still will take a JD z-trac over anything I have used so far. Alright, all you Exmark fans, Im ready for the heat!