I've done some searchs, but not any real reviews of them. We have a lot of commercial properties that are pretty open and easy to get to. The Z looks like better option for larger properties than some of the other ride on's.
Pilgrim - I did talk to a local guy that has one and his only complaint was the pump being replaced several times. LT support told him that he shouldn't run liquid fert through it. Care to share your secret for liquid fert?