I have it, have had for about 2 months.
I havent checked to see if there is any staining, will do that maybe in another month or so i guess.

I have the (so-called) clear shistuff, its kind cloudy looking but i just wanted
to try it as its suppose to be good to below freezing as i used it in conjunction
with my phase cooler. Its currently used 24/7 for a HTPC

Its running in my same old Q66, NB, and 2 4770,s all watercooled with 2 ST 220
rads on a ST 355 pump and XSPC res. top in a single loop.

For any one interested in staining i will also post what i find inside after another
month or maybe when HES does his.