They don't wander if you know the feel, or even better, you can control the wander to recenter.If you use them in a hand drill, they have a tendency to wonder. Of course they usually use a drill press. I do like the way you can debur the hole with the next size.
Yes, rotabroach might get you a couple thou tighter if you need it, but they won't let you start with an already fucked hole... And in aviation, it seems we're always starting with an already fucked hole.
And yeah, I used them in place of a deburring tool a lot of the time.