I have alot of drywalling to do as well. I have been using it for the drywall that I am now doing (waited to write this review untill I used it on drywall). Again, the screws zip right in, the depth adjustedment makes this tool dummy proof.
I have read a couple of the reviews above. You certainly have to learn how to hold and balance the tool in your hand for clean fastening (like any other tool). Once you do that... this tool is it!!