These are wonderful. They fit well with plumber's tape with no leaks, and are easy and reliable to use. You can dial in a lower water pressure as needed very easily, and they shut off completely and open up well. The movement is smooth and tracks well, stopping at any point with enough friction to stay where you want it. The brass is solid and I had no reservations about getting a good tight seal. These are worth it if you want to put together your own dual shower head system and want flexibility with which head to use when. This works well with the O-Flo Dual Shower Adapter - All Brass with Chrome Finish - Enables the use of Twin Showerheads.
I'm fairly certain you won't have any problems with these.