About 3 month's ago, replaced the wipers on my van,E150. Went into the local Advanced Auto store, checked out the Rain-X. Thought,wow, like $16-$17 for one blade. So, thought a minute, and it came to me. 95% of the time I'm driving by myself, why put that expensive of a blade on the passenger side, when nobody's there. So bought a store brand for that side. Around $4 or $5 I believe. If it's just rain, can't tell the difference between the 2. If it's a rain/ice mix, which we've had quite a bit so far this winter, the cheaper one works better. The Rain X commercial's always stated, when your looking out the windshield, it'll keep the center cleaner, the part your looking threw, wrong. Switched side's with the blade's. Go figure. gypsyman