I could be wrong, but I think that some folks out there are simply more discriminating than I am. For me - all of these brands provide sufficient protection. I do agree w/ you that the sticky feel goes away...or perhaps I just get used to it.
I agree that some people are more discerning than others. I think for the cheap price, it's well worth the try. These are hard to beat for the price imo. They can always be thrown away if you don't like it. Heck, it's only a dollar shipped for many of them.
As for the sticky feel, I think it actually goes away rather than getting used to it.