First post here.
I just bought the Wahl Balding clippers and I used them straight out of the box without adjusting them. I was able to do my head fine and it got sandpaper-y close, but the neck was a little dicey and I had some minor irritation.
I adjusted them a tiny amount (I think the blades were actually over the guard a fraction of a millimeter) and now I can use them on my head, face, and neck without issue.
They are powerful, too; nothing like those beard and body trimmers that you've gotta run over the same spot a dozen times.