Just plug the adapter, select an unused frequency and adjust the radio. The transmission is stable and high fine. So to use easy. After driving just remove the adapter and the music on the iPhone is automatically stopped. Also works with a domestic radio.
Small drawback: Unfortunately, the fit is not 100 percent. The adapter is unfortunately somewhat from iPhone. The materials of the adapter are also only made of simple plastic. But for the price that's fine.
On long-haul routes (highway) there are often disturbances. Located in downtown, it is recommended.
Therefore, only a conditional recommendation.