I bought these 3 years ago.  I put the 21" on the driver side, and the 19" on the passenger side on my 85 Tintop.  

Rain-X Fusion Wiper Blade, 19" - Walmart.com
Totally happy!  They are sleek and stylish, work great, easy cleaning of bugs, no gaps in wiping, no chatter noises or any funny issues.  Granted....I live in San Diego, and my Vanagon is always parked inside a comfy garage.  And also, not a lot of use nor sun exposure since garaged...OK...will grant you that.  But, compared to many previous iterations and trials of wiper blades over the last 30 years, including the GoWesty ones and stuff from PepBoys, these are the best so far that I have tried.  I was so impressed, I also bought a couple months later the correct lengths to use on my 2004 Toyota Highlander (my everyday ride and likewise garaged) and am similarly satisfied.
Who knows...they might even be obsolete by now.  But I was and AM still so impressed by their performance, I wanted to pass this on.  Sure, they will wear out in the near future, but this would be my first choice for replacement.

Rich
San Diego