I bought the Toro SW5000 here a few weeks back..my yard is basically flat. acre, a few obstacles, just did the the lawn last night....done in a hour versus one and three quarter hour on a old craftsman 38" tractor. Had the yard done and trimmed in hour and half. Only problem I have is, I have lots of trees up on the boulevard, so I have to go picked up branches before I mow. Otherwise, so far I am happy with it for now, clean it after every use. I would have gone to 54" but don't think a 54' will fit in the shed...lol. So, yes they do cut your mowing time down and will vary from person to person and type of landscape you have. Only down fall of mowing is, if your lawn has open patches of loose dirt, you gonna get covered with dirt after you are done, I pretty much have to take a shower after I'm done, I just don't have a thick grass for a lawn , my soil is more sand than dirt in some areas wish I had the funds to do something about that...oh well.