I saw the Bodyworlds exibit this weekend.  It was pretty cool.  Most of the displays weren't behind glass, although you shouldn't touch the exibits.  I found the audio and written posters a little apologetic about using real human bodies.  It tried to convince us of what a big deal it was blah blah blah.  It took about 1 hour and 45 minutes to see all of the exibits