I used to see these things in cartoons and old TV shows and never having seen on "in person" before hesitated buying this.  I have a maintenance company that services my lawn.  Yet however, especially when it s rainy some areas need a quick touch up between lawn services - this is perfect for my purpose - I do not need to worry about having keeping gas, maintaining or storing a lawnmower.  This works well and it is virtually maintenance free.  I works well on the first pass, but if your lawn is particularly unruly, you will need a couple of passes to mulch the clippings or get a clipping attachment also available.  As a main mower, I think you could reasonably use this for 1/2 acre or less.  My kids get a kick of how low tech this is - but that is precisely the beauty of this product.