Perdido Street Station / The Scar

So I just finished reading this and I have mixed feelings about it.  On one hand, it truly is some excellent writing (even if Mieville appears to have a serious fetish for describing every thing ever) and the science/magic stuff is awesome.  On the other, the ending had to have been one of the most unsatisfying and depressing things I've ever read.  I mean, what happened with Yag, I could live with that on its own, but that coupled with Lin's condition, the lack of explanation behind Jack Half-a-Prayer and his involvement, and the lacking of Motley even getting so much as scratched left a sour taste at the end.

So now I'm debating whether or not to read The Scar.  Without any of you spoiling any of it for me, I need to know: is anything from Perdido Street Station resolved in it?  Is the ending at least someone satisfying?  Is it worth my time to read?

I think the major weakness of the Iron Council was that in previous books, Mieville's success was largely due to cultivating a sense of place. In PSS, we got a really good feel for New Crobuzon: it was gritty and realistic enough to be absorbing, detailed enough to be continually interesting whenever new details get thrown in, and most importantly, never demystified. The strongest impression you get of New Crobuzon is that nobody knows it all, or can control it all. In a city full of vampires in disguise, people controlled by hands that dominate your mind and let you fly around and spit fire, various beast-races, and where university degrees are actually worth getting because they let you do stuff like reshape the flesh of people you don't like, there are too many rogue elements for it to be contained, even within a novel as sprawling as Perdido Street Station. The government, while impressive flexing its police-state muscles and cracking down on indie rags and rioters, needs to call in favours from less than reliable allies, including demons and extraplanar spiders in order to get something done. Intel is unreliable, and despite all the talk about it being monolithic and mighty and scary, during the novel we actually encounter people who make a living off working their way through the cracks.