Works for me
I work long shifts on my feet, in constant motion on concrete floor and get terrible pain and cramping in my feet as soon as I get off them.  This works well to break the muscle cramps.  I only gave it 4 stars because the two levels of built-in intensity settings don't seem to be very different.  But then again, for the price I shouldn't complain.  This is the most inexpensive shiatsu foot massage I found on the market and yet it is very powerful, sturdy and well made.  It has a strong kneading action.  The heat is perfect- not meant to be a foot warmer but meant to loosen the muscles for a more effective massage.  I've had this machine a bit over a month now.  For the relief it has provided me, it has been priceless.  I strongly recommend for anyone who suffers from overuse of foot muscles.
Rating: 4 stars