My friend raved about the blue cheese crumble burger while I was in Lincoln so we made the trip to Greta's. It definitely does not look like a typical burger joint on the outside and is a combination of a deli meets butcher shop. The blue cheese crumble burger was very good. With the burger came a bean soup that really was more what I'd call chili, which was superb as well. My friend told me that the burger I had was rated second best in Nebraska, and I think I'd agree.