In his guidebook, Rick says:
You have two choices: "Visit to the dome" includes a good audioguide
and is plenty for most; the 90-minute guided tour provides more
in-depth information.
I'm curious, though, if anyone has done the guided tour and if so, what you thought of it. Or if you just did the "visit to the dome," did you wish for more in-depth information?
I only have 4 days in Berlin (plus two half-days on either side), and it seems there is so much to see. I'm willing to spend 90 minutes on the guided tour if it's really worthwhile, but if Rick is correct and the dome visit is enough, I'll spend the time elsewhere.
Thanks!