I just wanted to send out a quick FYI about the National Archaeological Museum in Athens. I visited it this morning (Jan 20th 2016) and was looking forward to the Rick Steves Audio Europe App Walking Tour. I did The Acropolis walking tour the day before as was very pleased so naturally I was looking forward to this tour. I found out that the museum is grossly under staff, and because of this large portions of the museum is closed. Because of the closures almost 1/2 of Ricks walking audio tour is not accessible.
If you reference the maps provided for the walking tour (https://www.ricksteves.com/watch-read-listen/audio/audio-tours/map-audiotours-athens-nam.pdf) the points of interest number 3, 10 & 13-20 can not reached due to closed off areas. There are also a number of other areas that are not covered by Ricks walking tour that are closed off as well.
With that in mind you will need to determine if it is worth the 7 euro entry fee.
Hope that helps someone out.