I recently went to the dealer to get new inserts for my wipers. I'd tried inserts from the local auto parts store, but they never really worked as well as the original rubber that came with the car. So I decided to try what the dealer offers. Two inserts were something like $15. Not great, but I thought it worth a try. You cut them to length, so I measure each insert against the specific blade and cut to length. I cleaned the windshield -- no RainX or anything else applied afterwards. Gotta say, they work great. No steaks, no skittering. Just nice, quiet, smooth operation.
Could I get the same results with after market blades? I still think I might, but just wanted to say I tried the dealer inserts and had great luck with them.
Edit: In case it's not clear: I don't have Aero blades, just the conventional type.