I bought the frameless wipers that Wal-Mart stock — their brand is Viewmax Plus, and they stock only one. (The driver's side requires a 24" and the passenger's side a 20" size.) So far so good, but the first freezing rain will tell! Certainly they seem to conform to the windshield on the passenger's side better than the stock wipers, which have the contacting problem outlined by others above, as soon as the temperature drops below freezing. They seem well made, and fit straight out of the package. The price (in Canada) was C$15 (~US$13) each.

Stan