Daniel,
I hope the information saves someone a little time, energy & money. I think many people will like the Ultra Smooth Wood Owl bits.
In the class I took on building Windsor Chairs we drilled all the holes for legs, rungs & spindles with powered hand drills or braces. It is difficult to get the pieces of a Windsor that need such holes onto a drill press. I think it is just easier and faster to do those holes by hand. Peter Galbert used multiple mirrors to help us see how to align the holes in the Windsor class. I know there are many other methods. I am taking another class at Highland Woodworking in January "Build a Pair of Sawbenches", with Christopher Schwarz.
The main reason I am taking the Schwarz class is these particular sawbenches will be built using Windsor Chair techniques. Specifically the legs will be attached to the bench seat using tapered mortise-and-tenon joints. I am interested in learning Chris's technique for getting those tapered holes in just the right place with a brace and 5/8" auger bit. The tool list for the class lists a brace & auger bit not an electric drill.
I had a problem seeing: two mirrors and a Festool drill and bit well enough to get my holes aligned in the Windsor Chair class. My weird vision and progressive bifocals didn't help. I believe it will be easier to see the angles using a brace vs an electric drill. I am about to find out for sure.