It IS amazing! I was there within a month of the new exhibit opening and it was fantastic. My son, then 10, loved the hands-on, interactive exhibits that surround it, dealing with everything from using a periscope and codebreaking to buoyancy. And of course, seeing a 252-foot-long submarine indoors.
I gave tours on the U-505 in the late 1970s and early 1980s and thought the changes to the tour to stress the drama of the capture was excellent. It's not just about how the thing works but how the men lived and nearly died.
The U-505 is a must-see for any sub fan.