It got drilled on "hardcore" online sim reviews JV.
I was waiting for this one for YEARS, and buying "Das Boat" (the directors cut), didn't help last week.

Damn, watched it 50 times on the regular video, it was so more enjoyable (and horrible) directors cut!
The basics were the 800X600 res limit pissed a few off, and the realism concessions like spawning to a point with full fuel, and a scripted mission set (same deal every time you
HAD to redo a mission to get to the next) wasn't well accepted.
I won't buy it now, but I think there is a huge market for something like that with realism settings adjustable for diehard realism, as well as the Novalogic niche players. Would that a been so hard? Arrrg.
You'll find the AH crowd caters to the realism part, no matter how boring, and others will have a ball if they don't care. Take AH BBS responses accordingly. Reading other reviewers on non-sim sites, they actually do like it. Of course I loved Beachhead 2000 bombed for hours, but shhhhh.
I'll just wait for a developer to make a super real WWII sub sim. It's all pucker factor anyway in that genre, why skimp?
Answer: To sell games, and they didn’t have development recourses.
farts!