Keys 4600T Treadmill Review
TREADMILL DOCTOR NOTE :
For $1600, go with NordicTrack, Pacemaster, Sole or Smooth. They all make better machines and look much more stable for the forseeable future.
Put simply, don't buy a Keys machine. They are stumbling and about to fall into the black hole of failed corporations so parts support is shaky at best and you can forget the warranty if this happens.