I've just got a SGP protector.
Fits perfect, and in several years using various makes, this went on perfect with no creases, bubbles, marks, dust or hairs.
There are five types to choose from - I went for the Ultra Optics which seems to strike a balance between hardness, light transmission and anti-fingerprint.
It has a matt finish which is not as slippery as the bare screen or gloss protectors, but it does not attract fingerprints. The oleophobic version is like the bare screen - gloss finish and it will get grease marks but is easily wiped. The matt finish of the Ultra Optics version feels a bit odd at first, but is just as sensitive and you get used to it - but you don't have to wipe it every five minutes.
Search ebay for " gutkoreainc ". Works out about £13 delivered to the UK in 8 days or so. And this is for two protectors!
Top quality and a bargain, and I'd recommend the seller