I used to use them, until I got laughed at, at the track.
It was suggested that I invest in a real hone by my crew chief/tuner, who is a 5 time world champ in TAD who was doing the laughing.
Since then I have had way better luck rebuilding motors and have had great ring seal.
If your gonna do it again and again, I would invest in one. It's cheaper than a CK-10. Also need a dial bore gauge, a big drill and big arms.