The included nuts I can not judge because I do not use them - I have the same the "colorful" Long Nuts ordered with rim protection, and the class are (see other review.).
Benefits:
The part keeps what it promises. Almost all bolts and nuts has solved it right away, two or three (of 40) I solved by hand (which is the impact wrench would someday maybe done, but I was in the long run too loud). Compared to manual batch and tightening the already tremendously saves time. I had beforehand concerned that my machine rips the wrist, but the screwdriver is easy to handle, well balanced (albeit not a featherweight) and does not rotate significantly even while hitting out.
For my 40 studs / nuts per season and other occasional screws m. E. the right choice, I would buy it again.