I have taken the Original Berlin walks 3 times with a group and one time as a custom walk. They are CHEAP and excellent.

The overview walk is quite interesting and you get a good handle on the highlights of Berlin. I have also taken the Concentration Camp tour through them and that was superb. We also took the Third Reich tour and this was excellent as well.

Depending on whether you are staying in East or West Berlin, there are two spots to pick up the tour. Make sure you go to the one closest to your hotel. You can pick up transportation and discount booklets at the airport and I highly recommend this. You also get a discount on the tour and museums. You will find it necessary to use the public transportation system versus cabs in Berlin as it is a large city. The public transportation is excellent and cabs are very expensive. Most restaurants are excellent and many are casual. I don't remember the names of the places we went, but they were recommended by our hotel. The Radisson is centrally located and has two nice restaurants. I highly recommend the Topography of Terror museum (outdoors) and Checkpoint Charlie Museum. Skip the History of Berlin Museum. The art museums were great.

Have a wonderful time. It is a very interesting city. You can get a great flavor of the city by taking these tours and visiting these two museums.