Received drill attached sheetmetal sheer two days from ordering. Shipping box arrived in one piece. The tool looks well thought out, I tried it on two different drills, both cases the mounting mechanism coped with size differences.
Cutting with the tool was good, and speed of Cutting was drill speed dependent but on the medium side on average.
If given the choice i would definitely choose the attachment over cutting by hand. Overall for the price its a no brainer for me.