I was very skeptical, assumed this was a green gimmick, but I love it.  It's lightweight, easy to push and maneuver, quiet, zero gas, zero power plant emissions.  It is easy to adjust the height now that I found the levers (they were tipped forward by the other wheel).  However, this mower is for lawns only, and not everything we call "grass" counts.  Coarse grasses with thick rigid stalks do not cut well, if at all. Fescue and warm season lawn grasses do fine.  Sticks, even small ones, will jam.  I just toss those into the beds while I'm picking up doggie deposits.