I have installed several of these plastic feeder chains, they seem to work and stand up very well. From what people have told me they tend to be more gentle on delicate crops and have some flex to them. This is advantageous if you happened to pick up a rock or something which would cause a steel slat to bend or break. The drawback, the same people say is that sometimes in tougher crops it is tougher to feed the crop in as a result of the less agressve surface of the plastic. Keep in mind this is not from my frist hand experience, only from word of mouth from other farmers.