I'm using ClearPlex on all my windshields, given the deplorable conditions of the Bay Area freeways. If you plan on tracking any of your cars, then it's definitely a must in order to avoid pitting from unavoidable debris. Also, it pays to get a top-notch installation outfit as it could make a substantial difference in clarity and in adhesion of the product. You may consider inquiring within the general auto forum, be it BMW or any other brand, to find a good local installer.
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