Yeah they suck and they are expensive as well! Gym owners should realize by now thay you could buy 2 pieces of better equipment for the price of 1 smith machine or a whole load of free weight... But no, They buy it, because they feel it is safer for the beginning trainee, because he or she can always bail out and rack the weight quickly. However for a more advanced person using REAL weight the smith just put too much shearing forces on the knees etc and the plane of motion for most other exercises is pretty unnatural / often useless as well.