It's pricey but solid. Really shines at fast, accurate, repeatable cutting. Great for door parts, face frames or anything else you need a lot of the same measurement. Tape comes out once and then you fly. I set it up like Dave for crown, but if you're just doing crown all day you can set up the extensions reversed and use the back lip for a stop in the front. Little awkward to set up but worth it for an all day set up.