It is my go to windshield cleaner.
RainX windshield washer fluid remains liquid in very cold temps.  It does a fine job of cleaning my windshield, even when it has road salt build up.  It leaves an invisible coating that causes the rain to bead up and run off, I like this feature.  It is my go to windshield cleaner.  There are cheaper products, however I'm not interested in them.
Rating: 5 stars