Best Indian food in Dortmund to be sure, so if you're dead-set on having strictly Indian food, by…read moreall means go ahead. However, Indian food can be a bit expensive in Germany, and if you're down for something much cheaper and just as good, there are Sri Lankan places in the west of the city around Unionstrasse U-Bahn Station.
That being said, awesome curry dishes (Madras became a new favorite of mine), great naan, and generally great service.