This is definitely worth doing, but do 2 days unless you only want to sit thru the bus tour. If you want to get off, you need to get the 2-day pass. The palace alone is a couple hours because of the size of the place, and the fact that the bus only stops there hourly. shopping DT is amazing, check out the open market. It's the best and the shops are great. We actually did Schwabing a little with friends the night prior so we didn't even want to bother during the tour, but that's the Munich SoHo area, very cool. We stayed near the Olympic Park area so we did a walk-thru (not the hilltop) in about an hour. Book a BMW plant tour ahead of time, or the museum tour (if you are a real BMW fan), otherwise you can't do that. So all in all - book the 2-day pass to really enjoy the city!
This is amazing. Incredible. It's hard to describe because of what happened there, but it is a MUST. We did the half-day tour which is enough. We had a great tour guide, and the tour is unbelievable. Take water, we were there on a very hot day.