I've been using the triple edge from wal mart. They are supposedly silicone instead of rubber and are supposed to never wear out. I don't know that they never will but I have had them on my truck and the wife's explorer for over two years now and no problems. They work just as good as new. Can't remember what I paid for them but it couldn't have been too much from wally world?

 

I bought a set of Rain-X but never got to try them out... Still sitting in the garage in the original box

 

i have piaas and love them they work great and they were only 20 on amazon

 

The valeo works very good and the ones i've used on the wifes car last about 1 year. Tirerack usually has a buy get one deal.

The triple edge silicone ones from walmart also seem to be pretty good. They are around $14 each I think and have a lifetime warranty. Not sure how the warranty will work.

Currently I have PIAA's silicone on the truck and they seem to be pretty good too. They have been on for around 6 months and still going strong. I got a good deal on them from Amazon...$20 for a pair.