That sucks. I used Girots' Window Sealant, and it worked great. I glass clay-barred and polished the glass before applying the sealant. The autowipers work very well with the water beading.
On Amazon I’ve noticed that the same exact reviews will appear from multiple vendors of the same product. So it’s likely that you were just looking at reviews of the genuine product, not necessarily whatever that particular vendor was actually shipping.