First of all, I really love the bits. They have a texture to them which I believe gets a little more grip on the screwhead. I鈥檓 mostly using the P2R2 combo bit, which is really versitile here in Canada.
I used the drill bits as well but they come loose while drilling using the included bit holder. I think if you鈥檙e going to be doing anything serious you鈥檒l need another locking bit holder.
This kit really makes my basic Bosch electric drill so much more versatile and quicker to swap things out when I鈥檓 on a project.