I'm not that big puzzle game fan as regular readers will know, but this game has such a dark and mysterious atmosphere that I have to say I quite enjoyed. Some of the puzzles were almost mind boggling hard that I had to revert to a dutch walkthrough to be able to progress. I learnt quite a bit about the USSR while playing this too, learning in a video game? Pssh! What is the world coming to!
I'd only recommend this to dedicated adventure puzzler fans however - buy at your own risk otherwise.