The owner is very friendly, she started the shop about a year ago, and the shop seems to do well so far.
The shop has its own web site http://www.die-weimarer-kaffeeroesterei.de
The city of Weimar itself is also definitely worth a visit, it is a nice old town with the Bauhaus museum and the Goethe and Schiller museums.
The roasting machine itself has a prominent place in the shop, it is shown below:
