I recently replaced the wiper blades on my 2000 Monaco Diplomat with Michelins from Walmart. There are three versatile adapters in with each blade assembly. They are 28" but I had rather have a good coating of Rain-x on the rest of the windshield since the blades actually cover a small portion of the actual glass area.
Longer isn't always better (OK...minds out of the gutter). I have a Kia Spectra SX that calls for a 32" blade on the driver side. Regardless of the brands I have tried, after a couple of months, it begins to chatter for sometime in a light rain. I'm considering going shorter with the blade in an attempt to stop the problem.
Randy & Sheron
2000 Monaco Diplomat 38D, 315 HP
1993 Rockwood Embassy E6321 diesel pusher
1998 Jeep Cherokee Sport 4X4