Got my Skinomi skin applied on my Galaxy Nexus. It's been 4 days now.
I had to tell people it was on, several people couldn't tell it was there.
Screen quality doesn't suffer, everything still looks awesome.
The fit is great, it covers the entire screen perfectly.
When the screen is off you can see a subtle orange peel effect but it doesn't affect anything negatively.
The feel is the best feel I've ever experienced from a screen protector. It has a slight rubber feel but you can still slide your finger effortlessly across the screen. Its obviously not as good as the glass, you have to make your touches slightly more pronounced to register whereas with the glass you barely had to touch the screen, sometimes the phone would register touches even without touching it as the electric current jumped from finger to screen but those instances are gone with a screen protector.
Overall the Skinomi skin seems to be a good match for the galaxy nexus.