According to your review, it doesn't really look like a very desirable screen protector. How's gliding on it?

Both mine and Beavis's iPhones have PowerSupport Clear on the back. We kept it there and stick the Carbon Fibre back on top of the PowerSupport Clear SP, just in case that if the Carbon Fibre leaves sticky residue if stuck at the back, the SP will protect against it. I have more confidence in PowerSupport than SGP when it comes to not leaving a messy residue behind when you remove them.

So you can say that our iPhones are double-layer protected, but because the Vapor case just hugs the side of the iPhone, this double-layering does not interfere with the Vapor case when installing/tightening the screws. In fact, because of the double-layering, the back surface now looks like it flush against the Vapor case, like it is part of the case itself.

I've never said this before, but of all the cases I have bought(trust me, I have lots, from silicone, hard TPUs, cheap/expensive plastic, etc), nothing compares with the Vapor. The iPhone 4 with the Vapor case gives this feeling of heft and solidness when you hold it in your hands. And since both of us uses the PowerSupport AntiGlare SP for front and Carbon Fibre for the back, we dont ever need to wipe our iPhones down for fingerprints anymore. The back is covered with smooth texture by the Carbon Fibre, and the front is anti-fingerprint and antiglare. Perfect!