Very entertaining UBOAT simulation. The crew management makes you really care about your officers and crew, and provides something to do during the long patrols. The beautiful modeled interior makes me want DLCs with more submarines to expand the captain career into better ships (as unrealistic as it might be, gimme fancier UBOATS). Combat itself is satisfying, although not terribly challenging on lower difficulties. If you want to feel stressed, make sure to keep the difficulty settings high, and make yourself do the torpedo calculations for added immersion.