Mowing, as opposed to cutting down a field? When I am mowing the lawn, or brush hogging a field, I don't like to have my foot on ANY peddles. If there were a lot of obstacles, and you have to stop or slow a lot, then sure hydro would be nice. It all depends on the terrain I guess, but I really don’t spend much time changing speed or direction when I am mowing OR brush hogging, and my lawn is not that flat or clear. HST would be really nice when I’m clearing though – backing in with the brush hog raised to cut off the top, then backing out so you can see what’s there, and then going back to finish it off. Of course a shuttle will work fine for that too.