I'm going to support the "buy it now" crowd. I bought it back during the Summer Sale, it was more expensive than this, but I think it's a great game and worth the price. I think it's a shame that so many people focus on the bad things(I only encountered a few bugs, nothing major, really), when the game has so many wonderful ideas. The dialogue system as well as actual consequences for your actions were two of the major highlights for me.
I just completed another playthrough yesterday with different decisions, which was quite fun, even though I couldn't really bring myself to choose another weapon than the pistol again, since it's so damn OP, when you put a few skill points in it. I'll probably try on an easier difficulty(I've only tried hard so far) and go rampage with some of the bigger guns. Should be... interesting. Or rather, try a run with only gadgets or something like that. There are a few different ways to go through the game, despite what people say.