The whole oil rig take is cool, partly because it's new but also just because it's a really great theme to try out.
In Tronyn style, these maps are hard and tough. Wide open areas with multiple sight lines means monsters are shooting at you constantly. You need to try to keep under cover until you can get in there and wipe out the groups. I find the second level is the cooler looking of the two. Set on an offshore rig, you have to make your way up to the top of the thing, dodging monsters and activating lifts.
Otoh, the massive scale of everything can sometimes leave some areas looking a bit empty. Of course, all those monsters should be keeping you busy so you don't notice these things. :P