Indeed, it does look good. The helmet seems a bit to "sharp" if you compare it to the halo 3 trailer. Infact, everything looks really sharp. I was under the impression from the books that the edges were a bit more, forgiving per say. That said, top notch quality and fantastic paint job.
Also something that I see is that they are projecting this as H3 armor. Look at the hand plates....theyre still H2 style. While not a huge deal, its just a ispy kind of thing.