Thank you so much for taking the time to post all this information. I have tentatively scheduled our days to include two of the walking trips and the museums you mentioned. We booked the Marriott because it looks like a good location and was a terrific price (I think 129 euros including breakfast!) Thank you also for telling us to forget the History of Berlin museum....it was rated well in our tour book, but will give that a miss based on your recommendations.
Cheers, Pam
