If you're still debating whether or not you'll be picking up Demon's Souls next month, there's another glowing review for you to check out. This one is over at PSX Extreme with a score of 8.8/10:
For what it wishes to be, Demon's Souls hits the mark. Perhaps the audience in question is too niche to yield huge sales, but I'm confident in expressing my praise for this production and I expect many gamers to reward Atlus for this effort. I still think you have to be too close to lock on, the parrying is a mite too hard, and the Soul accumulation seems to dictate the entire game (you'll spend a loooong time staring at the screen, wondering how best to spend them). But outside of this, the combat is extraordinarily well done, the available classes are all distinct and require extensive experimentation, the game looks and sounds fantastic, the enemy roster and landscapes are diverse and beautifully designed, the bosses are legitimately frightening, the challenge is high but the payoff is huge, and above all else, those who get sucked in will be there for a very, very long time. If you fit the description of a hardcore RPG fan, there is no other game out there that will give you more bang for your buck. Plain and simple.
It's a winner, folks. A big one. But only if you're a part of the intended audience. Please do bear that in mind.