Awesome mask. Matches Multicam pretty well, but it is a little "greener" than the original pattern. I assume that is because of the type of paint and finish used on this mask. Really not a big deal though...you can tell unless you really look.
This does pretty well with not fogging up, especially with the thermal lens. I would recommend taking off the top piece (whether you're using the visor or the shield) because it holds in air, and tends to make the mask fog faster.
I found this it was pretty easy to look down the iron sights on my G36C. I HAVE tried looking down the sights of an M4, and it really wasn't to bad, it just takes some getting used to.
Overall, I give this mask a 9/10
-You can literally replace every piece on this mask, whether it's the lens, foam, or back-strap.
-Looks cool. Save Phace has some really sick designs.
-You get a lot of stuff for your money. Having TWO thermal lenses is awesome when switching playing environments.
-Sub-par FOV...however, the low profile and lightness of the mask makes up for this.
-I guess you could say that it isn't "low-profile" enough to use some iron sights, but how many masks really are at this price range with this level of performance?