Mostly I wouldn't field it because it'll look so good at my desk! Lol I was just kidding, though I did buy it for it's looks more than stats.
Also, I hear people talking a lot about liking the other big'uns sculpts, but people tend to mention the Brutal off-handedly, commenting on its state as the ugliest Emissary. I know a lot of people hate on the sword, but in all honesty it's not much worse than say, Lilith's sword. As for realism, it's bounds more realistic than hers or many others.
I actually find my least favorite to be Shadow, which is most people's favorite. I just don't get the flak, I guess.