By selection they have the best selection of local beer. Being in Milwaukee that selection is very large. If I wanted the largest selection of miller, bud, and Sam Adams, yeah, I would go to a larger grocery store.
Also, whole foods and out post are both about 10 mins away. Woodman's is about 30-40 minutes out, and to find a large liquor store I would need to go even further since I live in the Third Ward and there are no liquor stores near me.