It's a small town not known for much other than Carl Zeiss. The Christmas market had two areas which were smallish but contained everything needed. In fact I'd argue it had almost everything Nuremberg did (other than the singing) and in a smaller area with much less people.
The Jenaer bratwurst is a tasty long thing in a bread roll. It was actually more satisfying than the Nuremberg equivalent of which they are famous.
Additionally the quarkballchen is something I didn't find in Nuremberg at all. These little sweet fried donuts of goodness are definitely worth the effort.