I found this tool effective. I love that it has a case that fits all the parts, the build quality matches the price, and the tooling works. I was concerned about the functionality of the screen but again found it quite effective. I did 28 holes in a 56 hole project and the blades are still doing their job well. I'm not that concerned about the quality of the cut so I have a large tolerance. I wouldn't say the hole is rough by any means, I would equate it to a regular hole saw. It should be noted that the cleaner you want the hole to be, the more even your blades should be. IMHO this is the limiting factor of this tool. That being said, I want to say that this thing is a winner.