An interesting and atmospheric attraction. It's a couple of stops on the U-bahn out of town, so easy and cheap to reach. The only way to get into the courtroom is on a guided visit (Saturday and Sunday afternoons at 1, 2, 3 and 4pm). The tours are in German, but there is a leaflet in English and other languages. And the guide uses pictures and a video (which has English subtitles). Only 2.50 euros to get in. Although the layout of the courtroom has changed since 1945/6, it's still a very evocative place to visit and worth a look.