Solid gameplay, great story... if BioShock suffers some anything is a major case of the Ayn Rand and typicality.
Gameplay handles fluidly, like you'd expect any FPS in this era. Everything is dark, brutal, and grungy, with water leaks all over the city, blood drenching just about every square inch of the places you walk, and if it's clean, it's likely because it is due to be blown to hell by you. Despite the rough world that surrounds you, everything looks quite gorgeous, and if you're not busy avoiding gunshots and homicidal maniacs, gazing out the windows into the ocean can offer a certain charm.
This is a great game when it comes down to it. It looks good, it plays well, the story is interesting and climactic, and the game really has no weaknesses beyond not deviating much from FPS clichés. It's hardcore, rough-'n-tumblin', and definitely worth any gamer's time.