I ordered 3 sets of these tracks. 2 sets were precision made and perfect fit with a good finish. For this I would have given it 5 stars; however, the last track set ordered was prooly made as the holes for inserting the coupling pin to join the two ends of one track were not drilled all the way thru and the holes on the other track were drilled off center. Therefore the tracks could not be coupled together. So 2 sets get a 5 rating and one set gets a 1 rating or roughly a 4 average.