Review on TOPPROS Milling Process Stanless Diameter by Pete Hahn

I bought this to drill a security peep hole in a wooden front door. I started with pilot holes of increasing radius to ensure the hole stays straight. When I used this bit to make the final hole I messed up the front door. Not sure if it's not sharp or just not balanced, but I would make an oval hole instead of a round one. Avoid if possible.