It works I guess. I've never had a great deal of experience with it. When it first started coming onto the scene ten or so years ago we did a mess of em, but anymore I kind of think of it along the lines of cryogenics: A novelty.
I really wonder if it truly pencils out cost wise. Like I eluded to, I'm probably the worst person to ask. I'm very slow/reluctant to jump on wagons until they truly vette themselves. I've seen many a discussion where SBN is 50/50 on results.
Today's gun community is a whole lot different than 15 or 20 years ago. Anymore, sourcing a barrel is pretty easy and a lot of shops have gotten way better at faster turnarounds. We hold ourselves to 14 days, but routinely get them in/out in a week or less.
I personally feel that if a barrel settles down and runs the number, don't mess with it. Run it till it gives up the goods, then hang another one.
C.