I've been away from the genre for awhile, and just got back into it.
I bought UBoat the other day, and have been playing it a lot. So far, I love it.
I also picked up Wolfpack and Crush Depth, and have also reinstalled all the usual suspects, and my other naval titles.
I now realize how much I missed my subs and ships.
This title? Yeah, buy it. Great stuff!