FWIW, Consumer Reports tested blade and the Valeo 600 series and the RainX Lattitude came in 1st and 2nd place. The Bosch Icon was rated eight, and the PIAA Super Silicone was 7th.

Note: The RainX did not clean really great, but it had a long-life, cleaning the same after six months while all the others had declined measurably. So go for the Valeo 600 if you want the best cleaning action.

P.S. One side effect I have found with Rain X is that your windshield will frost-over more readily overnight outside. I guess the same properties that cause the moisture to "ball up" also tend to encourage frost development. I did a test one Fall, going into Winter, and treated only one side of the windshield with Rain X. On many mornings I would come out and find that the Rain X-treated side had frost on it that I had to scrape off, while the non-treated side was clear of frost.