I have that set. The killer is that not one....and I mean not one....bit in that whole set was straight. Every one wobbled. I still use the set. For the $30 I paid on sale, it's a good deal and makes fine holes for rough work, i.e. furniture, bookcases, etc. I don't let them anywhere near my guitars or anywhere else I need a precise hole.
It's funny because just today I went out and bought some more brad points, cursing that stupid set under my breath.