Alright, finished it on Devil Hunter. Took me a little over 10 hours. I finished the first half of the game (which meant I'd covered all the locations/screens) in ~6 hours; so it's roughly the size of Lost Planet but with 2 runs. In today's high development cost environment I guess this is what is the norm. Will be interesting to see if RE5 is actually 12-15 hours of original content, or my guess is that it'll be an 8-10 hour game with a ton of RE backtracking to make it 15-20.
Lemme see:
Graphics: Sometimes the game looks INSANELY GOOD (aka, certain cutscenes) to the point where I had to check to make sure it wasn't FMV. Other times the game looks fucking terrible (Nero's run through the forest; the contrast is all washed out and is HDR lighting gone wrong so instead it's like no lighting and just the horror the horror; plus it's the only part of the game where you get framedrops from 60fps -> something lower). Most of the times it looks passable. The enemy models and character models are excellent, but the environments have their ups and downs with a good amount of ugly and a few rooms of gorgeous. 60fps is essential and for 95% of the game they pull it off, so I'm happy. In the end I don't play action games for their visuals so whatever. 7.5/10.
Sound: Uhh, it's DMC. The only thing I'll mention is that in the cutscenes the voices seem mixed pretty low and music/se adjustment doesn't effect it >_<
Story: I don't get what all the pre-release spoiler lolz was about. I didn't notice any plot twists or anything in the game that would put people up in arms. It's a typical stupid action game story. Nothing better, nothing worse. It doesn't have the cool cast of DMC3, but it's not horrible like Lost Planet. All the cutscenes in Dante's side were awesome and worth watching. A few of the Nero ones were good, most of the Nero ones were lame because Nero is lame anime emo boy.
Gameplay
Playing as Nero is awesome. While the first few levels SUCK because you have no moves and no money, once you start getting the normal moves he definitely feels like the advancement of the base DMC combat. The instant revving is the best feature in the game and makes fighting with Nero always fun. The timing is really loose on IR so that even folk like me who can't pull of 1 frame Guilty Gear stuff or Akira's 1 frame knee in VF can pull off IR 90% of the attacks. For that small group of super hardcore who looove the 1 frame, the game has a seperate small window IR that boosts your rev to 3 bars instead of just one. The combo videos of great players pulling off a 3 bar IR every attack and doing non-stop lvl.3 flame attacks should be enjoyable. The devil bringer is really good, though maybe it's slightly overpowered as seen in the demo boss fight with Berial. Basically instead of having to jump over certain boss attacks you can just grab the boss. But most bosses have a move to swat you out of their face if you keep hanging on.
As has been said many times in the thread, Nero's weakpoint is just that he gets no weapons at all the entire game and his move upgrades are basically just lvl.2 versions of attacks seen in the demo with a few more combos and seperate attacks. It's a bit of a shame, but the enemies and bosses are built around Nero's abilities and each enemy/boss will require players to make good use of the arm/IR to find the enemy weakness and take them out quick.
Dante is pretty awesome but not balanced in the slightest. During your few hours with Dante you will decimate every enemy and boss in 1/5th the time Nero can (outside of 1 enemy type which seems to be a pain for Dante). This is mainly due to Gilgamesh + DT = ungodly damage. But the rest of his weapons are really good as well. All the weapons in the game that Dante gets are useful and fun. The real-time style changing is great as well.
Bosses are fantastic. All of them are pretty much DMC quality and much better than pretty much every other action game in the industry. The patterns are slightly easier than DMC3, but, you'll still die once or two or three times to get all the patterns down, and then once you have them all down you can beat the boss with SSS ranks without getting hit if you're in the zone. The boss count is a little low, but considering the quality of the bosses and the lack of good action games in general these days, I'm happy with what we got.
Stages are average to bad. Some parts are confusing and some people will find themselves backtracking the wrong way because they're lost, other times the camera angles suck, and then the dice game at the end is a far worse version of the hall of mirrors from DMC3. There is a lot of running across the environment to the next area and you don't even get run as a default (which is a slow run even when you get it) and when you do get it it takes a few seconds to kick in. Obviously they did the few second bit so you couldn't just burst out a run on a boss and avoid all their attacks with ease, but honestly I think the best solution would have been to just make a smaller scale in terms of environments so you don't have to run these long screens. The generally weak stage design is one reason I think a lot of players will stick to bloody palace after they finish the game instead of replays of the main game.
Replay value is good since the core combat of Nero & Dante is excellent. I wish there was a pure boss rush mode (like using stage select in DMC3 to the boss rush stage; the one in DMC4 won't work as well) since the boss fights are the highlight of the game and combat. Bloody Palace should keep most people busy and occasional replays of the main game on higher difficulties are there for those that want to do it again.
Overall: The game plays very, very good and the action is always satisfying. When you play as Nero you'll want to play as Dante after a while since Nero is a terrible character storywise, but then when playing as Dante at first you'll feel the pains of not being Nero and not having IR/DB since Nero is a great character gameplay-wise. But then you'll start really enjoying Dante who is an awesome character both story and gameplay-wise. Both characters play very differently and have different approaches to each enemy type/boss. The ultimate game would obviously be a merging of the two characters gameplay-wise into an ultimate Dante and just play as him the whole time.
Unfortunately despite how good the combat is and how fun the game is when you are in the fight, the game is loaded with flaws and bad design decisions. These don't make the game bad and don't take away that feeling of fun you'll have when you play each level, but they do bring the excellence down a bit and make you think on how amazing the game could've been with a few changes here and there.
On a scale where DMC1 is a 9/10, DMC2 is a 6/10, DMC3 is a 10/10, DMC4 is an 8.9/10 to me.