There are two things that I wish DeWalt had improved upon. First, the stop  collars are fixed to the counter bore cutters.  I wish the stop collars  could move separately from the counter bore cutters, as such a counter bore  could be more than about 1/2" deep.  I've not actually tried to  countersince with this, though I have not reason to believe that they  wouldn't work great.  I am using the drill bits for some pilot holes  through 2x4s, and I did notice the bits struggle a bit.  They work but they  are not like a hot knife through warm butter.  Time will tell how long the  bits last.