If you own a PlayStation 3 and you like action games, you definitely want to pick up this game.
The GameSpot review and user reviews are pretty much on point. The most impressive aspect of the game to me is its presentation. It is very cinematic with varied camera angles and highly detailed environments that go from cramped areas to sweeping outdoor vistas. Sometimes the camera loses track of the action, but the gameplay is so much fun that it's easy to forgive.
This game seems to make good use of the powerful PlayStation 3 hardware. The detail in the environments, the rag doll physics, and the sheer number of enemies are a sight to behold. The frame rate only dips when there are dozens or hundreds of enemies in motion at once, which is also easy to forgive.
Many have complained that the game is too short. I can't agree with that. I'm not the most hardcore gamer, so many of today's games are too difficult or too long for me to complete. Even though I haven't completed Heavenly Sword (or gotten close to completing it) I do like that the game is presented in bite-sized chunks that are easy to complete. It makes me feel like I'm making progress, and allows me to play in short bursts if necessary.
All in all, you can't go wrong with this title. If you like action games and you own a PlayStation 3, this is undoubtedly one of the best games currently available for the system. I suspect that the complaints over how short the game is are just a testament to how good the game truly is--it leaves most players wanting more.