I have tried using this product a number of times and have yet to make a perfect circle! By the time you make it around to where you started, the cut does not match up. I'm very careful not to move the base of it and it still does not match up. The last time I used it, it cut half the circle and just scratched the paper on the other half. After looking closely at the blade, I noticed it was bent and that's why it didn't cut the other half of the circle. I don't think I was applying an abnormal amount of pressure. You have to apply some pressure for the blade to cut the paper. Needless to say, I wouldn't recommend this product.