Dave, my mud and tape work looks way better than the rest of the garage. It looks better than some of the stuff in the house.  That isn't saying that my work is that good, but the quality of the pro mud guys was that bad.  They only did one coat and didn't bother to sand any of it, then hid the poor quality work with the white primer.  At least I know where all the studs are because the nail holes aren't completely filled.