Okay, so, disclaimer: This game features a LOT of written text. Reading said text is 1/2 to 3/4ths of the gameplay. If you don't enjoy reading, this game isn't for you. Also, you can die in this game, and death can be a HUGE setback in progress (because while there are ways to mitigate it a little bit, death is permanent...time to start over). If those things don't bother you (or they are good qualities in a game, in your opinion), read on. Otherwise, this game isn't for you. Sorry.
Now that the disclaimer is out of the way, I just want to say, this game is insanely good. It's compelling in a way I haven't experienced for a long time. It's like sitting down with one of the most interesting, complex, well written books you'll ever find, and then getting to make all the decisions, fight in all the epic battles, etc etc etc.
You'll meet piRats and soul stealing monkeys and vicious scoundrels and squid men and zee beasts and cannibals and immortals and tiger people and face thieves and strange men from strange places where everything happens in the future tense. You'll fight on the sea, on the land, over treasure and power and the lives of your self and your crew. You'll find romance, long lost artifacts, gateways to other worlds, horrors man was not meant to know, and more adventure than you can shake a stick at. All this and more, coming at you in wonderfully written, beautifully presented prose that will sweep you away into a world at the border of insanity.
In terms of gameplay, it's a slower paced (which fits the world well), real time combat (although not twitch based combat), some random generation (so you're worlds different every time, to a degree), permadeath, stat driven rpg about exploration and investigation into a world of bizarre horrors, insanity, dark humor, and surprisingly human motivations.
At the end of the day, if you enjoy a good story (with choices that ACTUALLY matter), if you are the type of person who can fall in love with an imaginary world, if you like the idea of exploring into the black unknown, or if you just always wanted to be a zee captain, this is a game you won't regret purchasing. Remember, no one is born a zee captain, but anyone can be one, with the right motivation and a not-so-healthy dose of optimism. Come, zail the zee, it is calling your name.