Addicting, Great.
The sounds play a great deal in submersion and are great. Sitting on the edge of your seat as an enemy destroyer searches for you with active sonar is thrilling. Trying to figure out their distance and heading. Sound plays a lot into a WWII Submarine Sim and this game really brings it to life.
Game play can become kind of repetitive as you hunt down a ship, sink it, and return to port just to do it all over again but it takes a while until that point is reached. At least for me anyway a couple months. Overall I think this game is an excellent creation. I feel the submersion of it is much better than the newer Silent Hunter 4 and it'll have you scourging the internet to better your tactics, choose the best armament, and try to gain an advantage.