Like: Sturdy, comes with extra bits, locks in place very well so it doesn't turn when used Dislike: Really nothing Note: Didn't think twice and bought this at 2nd Drilling holes in the fiber cement panel at the eaves of my house. NO, it's not for that, so it was my fault. It cut 2 holes but has much blunter blade teeth now, but I have a feeling I could use it in drywall for quite a while longer. I tested it on a spare piece of drywall first to make sure it was the right size and would make a good hole even in fiber cement. Just take your time, stop, start and be patient when drilling into anything other than drywall or wood. This too was my fault. I will buy again if necessary. The size 6 1/8" was for the ultra slim halo ceiling light. Very happy with the hole.