Yay! I've been playing around 50 hours now, and I love it! Don't really like goin underground, too scary. Yantar's kinda easy, if it weren't for the Snorks.
I did a speed run through Lab (forgot it, the one in Yantar) and it only took me about 3:42 to get in and out. I ran though, took massive damage, and used all of my bandages and medkits.
Damn, I hate going underground. Too creepy in those parts....