Argh, had a whole review here and lost it! Don't feel like writing it out again. Suffice it to say that this reminds me of the pulpy sci-fi I used to get lost in over long summer vacations. Not flawless by any means but at least nominally researched, perfectly adequate, and fairly enjoyable. I like my science fiction with a good dose of the biosciences and this has a ton: wetware, human hacking, extremophile organisms, environmental armageddon. Amazingly, it's all put together logically so it doesn't feel too much like a stack of Discover magazines dropped into a blender and slopped onto the page. I will probably check out the sequels soon, especially since they're so available.
Oh, and it manages to be set in a deep water environment and include a good bit of claustrophobic suspense and body horror without stealing shamelessly from Sphere or The Abyss. A very pleasant surprise and more than I can say for other novels with similar settings.