I do use their wiper fluid and it works pretty good, especially when it rains hard enough. But when the windshield is coated in fine mist, it beads up fine, but there's not enough volume of water for it to collect into bigger droplets and blow off.

I had high hopes and they're well rated, I wonder if something's just different for me. I live in Western Washington, it's rare that we have heavy rain but we get tons of mist and light drizzle. The wipers just smear everything for me. Sometimes it seems like the windshield isn't wet enough.

I can tell you that the RainX blades I got were garbage from the start and they're no better now.

I've had good luck with OEM blades and they're cheap. Gotta try the silicone ones people are mentioning in this thread.