8/10, very good, but not perfect.
In terms of realism, about the same as SH3/4 out of the box which is what I expected. The lack of a fully detailed working TDC is disappointing for us manual nuts, since it was in SH3. I am also still on the fence on the new SH5 crew versus the sh3/4 crew management model.
In terms of graphics, a definite improvement over SH4.
In terms of immersion, simply amazing, the best in the series. Being able to walkthrough the boat and actually see your crew reload torpedoes (
those are BIG suckers! 
) or being in the diesel section when you order full speed ahead are moments straight out of "
Das Boot".
