I got 100% silicone blades about four years ago. They were economical to buy, costing less than Nissan or Bosch. They clean the windshield without streaks, and do not freeze in sleet or snow. At this point, the frames are starting to wear out, but the blade inserts have no wear whatsoever. Their one downside is that they work so well that in very , very light rain , when on intermittent, they get the glass so clean it dries and they squeak.
Here is the company's website.
http://www.silblade.com/
They also, um, come in various colors, if you are into that......