I've never had great luck using cherry juice. It never seems to get a strong amount of flavor. Maybe the tart cherry juice concentrate is a better route. It's not bad but I remember going back to the store to buy more juice and adding 2-3 times as much as expected to get even close to a good cherry flavor.
I have never added cherries or cherry juice to beer but from what I've read and heard interviews the stones have a great deal to do with the flavours especially the peppery notes Sent from my iPhone using Tapatalk