The product is not perfect but it costs only 15$. I have used Folder Match on PC and Folder Compare under OS9 which offers more flexibility. However, the program works very well. It lacks the possibility sometimes to exclude a file that you want for example on a machine and not on the other for reasons of space for example. But, as I said for this very low price, the product offers a lot and I highly recommend it. Also, the author speaks French too for those who needs some technical informations.