KGREEN,
I am very pleased with the BarSto. This one dropped in and has been 100% reliable. That has not always been my experience with BarSto barrels. Some of the others I have have had to be fitted.
I shoot lead alloy reloads for economic reasons and that was the main reason for the BarSto as Glock factory barrels do not like lead bullets, as you no doubt know.
Much is made of the accuracy increase from an aftermarket barrel. My G21 will keep both HydraShoks and my handloads in 2.5" to 3" at 25 yards. Not brilliant performance but certainly adaquate for "short range interpersonal crisis management".
I think the BarSto is worth the price but many are turned off by it. The next best, in my opinion, would be the KKM. A friend has one in his G21 and it dropped in and seems to work fine.