Worked great on a large home project hanging dozens of sheets of drywall. This bit (with a little common sense) sets the propeller to the correct depth just below the surface.
With hundreds of sheets of drywall and dozens of those sheets that have been lost, broken and ruined over the years. Hard to beat for the money. Of course that doesn't last forever. But buy 3 and it's still cheaper than most "brands".
First let me say that these beats did what they were advertised to do. They did a great job driving the drywall screws and making a recess without breaking the paper surface. BUT I found the main downside for my use was that they were much shorter than I expected. This made it difficult to get a good angle when screwing into corners and where ceiling boards meet wall boards. In addition, the bits held perfectly and did not rip off! Overall decent value.