I knocked my brains out with Aquapel, not once, but twice. I shake my head in disbelief when I hear a year, I don't think I got a month when I lived in NM.
Do I want to do 40 minutes prep with 2-4 products on outer glass every time and prior to using a rain repellant? Hell no, that's just crazy IMO.
I haven't tried them all, and I'd suspect Optimum, and the PBMG Products are pretty good, but as I look at it, you'll spend your money, roll the dice, and take the chances.
I figure like this:
Am I gonna beat my brains out and empty the wallet with uber expensive products that I "might" get an extra week or two of rain repellency from, but also pay 1-1/2 to 2 times more money to get such? I don't think so.
With Rain-X, my go to, I don't have to kill myself with prep, I just simply clean the glass first before applying. For outer Glass I don't get too anal on a product prior to coating.
I come behind with Rain-X, massage it in good, let haze a good 10 minutes or so, then come behind with a couple water dampened MF Towels to remove haze, then finish with a dry MF Towel.
I also wipe clean all Wiper Blades and treat with something or other, Reload, WG WETS, GTechniq CV2V3, along those lines, and have no problems with wiper chatter.
I think two of the common problems with wiper chatter are dirt cheap Blades, and a later depositing of road grimes. When buying blade replacements, here's where you shouldn't skimp.
I like this product for many reasons, easy to get, dirt cheap per application, and basically foolproof.
I'll never in my life buy Aquapel again, personally I think it's a way overpriced product that worked no better, and I'm not that rich a man to toss money to the wind on such a product, for how little an applicator covers.