As for the game itself, I'm near the end. The beginning 10 minutes were pretty awesome, then it slowly got less awesome as the time went on - the biggest problem are the splicers. They're just so damn repetitive, they always pop up when you expect them to, or worse, when you don't - they'll wander around the level, and respawn in rooms you just cleared five minutes prior - this is a huge pain because it's nigh-impossible to not fight them and conserve ammo. Nomatter where you go, splicers will be there. However, about 3/4ths through the game starts getting really good again, and around the end it gets absolutely awesome.
It's definitely not a 10/10, I'd probably give it an 8/10. It still can be quite fun however.