Those are Stany Boyle carom cues - made in Holland or Belgium. We had some in the shop in the late 90's - seem to be decent cues - since I don't know much about carom cues other than the ones we had in the shop I can't comment further than that.
I do know that at one time SB was making some one-piece (two piece glued together) house cues that the room owners were not to happy about. We had considered bringing in a bunch of them but the negative feedback from room owners who had them wasn't encouraging.
I don't remember any problems with the few cues we had in the shop. I don't think that I would go crazy to buy one though.