Can someone with experience with the SGP's AND with el-cheapo versions comment on whether there really is a huge difference? I find it hard to believe. SGP's screen protectors seem insanely overpriced, but maybe that's just me.
I'll give my thoughts on it after I install it. I generally don't pay for the "big boys" (SGP and Power Support), and have been satisfied with lower priced options from Boxwave (as long as you don't buy from directly), myGear, and a few other brands that sell on Amazon whose names escape me at the moment. I usually try to buy multipacks for under $10 and usually try both clear and anti-glare.
I did try a Power Support and SGP clear for my iPhone 4S and compared to a Monoprice screen protector, there was not much difference. The clarity was not noticeably different, but the cut was probably the biggest difference. Clear is clear, so I guess there can't really a huge difference for those, but for my iPad mini I went with an Anti-Glare. I got one from Boxwave that is working quite nicely, probably one of the better Anti-Glares that I have used, so I am anxious to see how the SGP Ultra Optics stacks up.