The bit is relatively easy to set up and I may not understand how to use it. The cutting action of the side blades wasn't as smooth as I expected. They kept bouncing, making it difficult to keep the drill straight. I cut out the corner part of the ceiling, maybe that made the job difficult. I'll try it again on a flat piece of drywall and see if it works better. If it works better or I come up with some tips I'll update the review.