Doom next gen

Anybody have this? I got it on release day. I'll have to admit, the first stage was bland as you get eased into the game. That first impression quickly turned around. I'm having a fun time playing it. It feels like a classic fps with a few modern components. No regenerating health...you have to find healthpacks. You still get overwhelmed at times when they send 20 demons and the kitchen sink at you. The good thing is that now you can modify your weapons and your armor's abilities. I'm not done with the campaign, but it feels like it'll be about 10-13 hours long. I haven't played MP yet. I at least recommend a rental for those of you that breeze through games.