I had a pretty poor experience with one barrel...7PRC, CF wrap.
I paid $60 extra for the hand lapping service, and it still looked like a Savage in there...OK maybe not that bad, but definitely the worst finish I've ever seen on a custom prefit (X-caliber, Shilen, and Snowy Mountain Rifles). I also scrubbed the crap out of it, and the corrosion/discoloration still didn't go away. It didn't shoot out either after about 50 rounds of testing before I sent it back to the mothership for a refund.
Customer service was acceptable in that they told me to shoot it and see if it was good, and if I wasn't satisfied they'd refund my money. That said, they were pretty accusatory and a bit condescending in their responses, and flat out refused to replace it with a different one. Basically said "You don't understand rifle barrels, and you'll clearly never be satisfied because you have a borescope..."
The barrel fouled worse than any of my other custom prefits also.
The experience cost me 10 weeks of preparation for a new rifle before deer season, while I futily attempted to test it before returning, then waited for Snowy Mountain Rifles to make me a barrel instead. The SMR barrel was only $50 more than PBB's Black Friday deal price, and was smooth as a baby's butt with nary a blemish.
Full disclosure, I can't really evaluate the accuracy, as the rifle had a stock problem, so the PBB could have been fine other than the appalling finish and surface corrosion. The SMR barrel did shoot better than than the PBB, but both were >2 MOA. Once I got the stock bedded properly, the SMR now looks very promising, but haven't had a chance to really tune it up. The SMR barrel also fouls less and cleans up quicker than any other barrel I own.