OK, I read all the encouraging reviews from guys in LA where the FM band is packed. "Wow, it's going to work great here in rural Vermont," I thought. Sadly, it's been one of the most frustrating gizmos I've every owned. I've tried it on all 3 of our cars on dozens of frequencies and the results are always disappointing if there's even a drop of moisture in the air. The only clear transmission occurs on crisp, dry mornings. So I can only recommend this for desert dwellers and other low-humidity locales.