I bought one of these for my Mafell tracks and it works way better than I ever expected. The adjustment to move the router to and from the fence is very good and simple to use. If there were a minus it would be trying to figure out which screw holes to use for your router. I bought it for my OF 1010, but ended up using with an Bosch 1617 with plunge router base. It works with the OF 1010 along with several Bosch, Dewalt, Mafell and Makita routers. Though I did not try it the manual says it works on Festool rails.