Just wanted to briefly profess my positive review on AWS with my X744. I've got three mowings under the belt and I've got it down where I can cut so close to the lawn and bed edges that I barely even need to weed whack anymore. It must save me at least 30 minutes and a bunch of walking around. It takes a little time getting adjusted to the feeling of all 4 wheels turning but once you start to predict it, it becomes second nature. No problems holding a straight line at all... Oh yeah, and this Yanmar diesel is crazy smooth -- only used about 1/4 tank of gas so far, will also be cheap to run. This upgrade from 400 to X744 is a huge step forward...