Yes, it's good. I have one and it takes the guesswork out of slicing door jambs and trying to find the center. It also comes with 3 different size discs that you can swap out depending on the gap size in a nice case with a foam insert. Could I live without the nice case and just toss the tool and discs in with my other vehicle graphics tools to save a couple bucks on the price? Yes. But, Yellotools make some really high-quality stuff, so it's ok I guess.