I have owned this jig for over a year and use it frequently.It is perfect for making guitar speaker cabinets up to 12" deep.Setting it up, if you have not used one before, took me 1 hour.Not the assembly, it is not complicated, but reading the instructions and adjusting the settings.The instructions could be clearer.When I started cutting practice pieces, I got the basic understanding of how it works and it was easy after that. It is easy to use and Goof Proof.I find that slower is better and the cuts come out looking better.I would not recommend for cutting plywood. It shatters even if you go slow.I make my cabinets from laminated pine.This is a super nice jig.