These bits rip through studs, joists, and rafters easily. Hold on to your drill tight, especially with the larger bits. These will easily rip a drill out of your hand. I have read reviews of these not working well in cordless drills because of lack of power. Milwaukee M18, M12, and Craftsman Nextec 12v drills have no problem with the 3/4" bit on nearly dead batteries. With only 1 bar of life on my M18 hammer drill, I drilled through over 20 studs without it stopping or killing the battery. The M18 has no issue pushing the 1-1/2" bit through 2 stacked 2x4s.
I bought the 3-pack to replace 2 bent bits from this set. Even with the bent bits, they are a better value than cheaper bits that don't work as well (Irwin, Dewalt, Craftsman from my experiences).
Pros: very fast drilling and sharp.
Cons: The narrow shafts bend easily if the bit grabs. The points dull quite fast which slows them down. Once the screw pilot goes through, it take some force to finish boring the hole.