“These couplers are superior to any other coupler on the market. I was using Marklin, Roco, etc., and all were difficult to use. They wouldn't couple on a curve and sometimes you needed to really push the carriages together to get them to stay together. The only minor criticism I have with these couplers is that the prongs that fit into the NEM sockets, need to be slightly modified so that they have a flat surface instead of a roundish surface. I recommend these couplers.”
