Yeah, I am really enjoying it. One of the things that turns my players off about CoC is that basically the game involves you being doomed by definition, which isn't the case with Vaesen - it's set up for campaign play, like a lot of Fria Ligan games there are rules for building a "base", in this case an abandoned castle in Upsala where you can restore or discover all sorts of facilities - but like I say it absolutely doesn't pull punches. It's by no means a cosy folktale thing, the general structure of a scenario ("mystery") involves desperately trying to work out what is going on and how to stop it before everything goes to shit, and the Vaesen themselves are creepy and lethal yet individual and able to be bargained with - very few are just monsters, they all have motivations. There's an underlying idea of incursions of modernity/technology producing increasing conflicts which is interesting thematically.
Rules-wise, it has a system where it's not that easy to die outright - actually impossible, though you may end up having to be saved within one round or you will snuff it - yet every hurt affects you, mental or physical, and once you are "broken" you start to accumulate Defects which may last forever. So PCs will improve in skill yet gradually end up more and more messed up. (Though sometimes it's an Insight instead, which gives you a bonus at times.) I prefer that to just "oh you're dead", injury always has some narrative meaning.
Also the books are super beautiful, the nicest ones I own.
I really recommend it. There's a Britain & Ireland sourcebook out there as well which is up for an Ennie I believe.