I have the 2 1/2 inch rockler set of letters. It is unbelievably easy to use. I picked them up on sale and with a groupon to lower the price even more. They snap together very easily. I would recommend using double sided tape to secure the templates to the workpiece; on the cover they simply use blue painters tape but I found that tended to move while trying to route the letters or curl up when the router passed over the tape. The guide bushing to go with the set was also very cheap, around $5. I also purchased their bit designed for the set, but have also used some other bits that fit through the bushing. I was able to very quickly make 3 or 4 signs as Christmas presents and have made about the same number in the months since then. They have worked well on pine, ash and oak. I would post some pictures but I lost all of them when i upgraded my iphone.