I'm so glad that I organised a tour to go inside and see the Town Hall - you really can't appreciate this WHS if you only look at it from the outside. The roland and the town hall are very pleasant fro the exterior, however.
Inside you get to see some of the original rooms and the role of the town hall in history becomes clearer. It wasn't used in the way we think of town halls - it was the epicentre of all the business and politics (back then, mixed) with guilds and merchants and nobility.
The decorations with the maritime motifs and all the relevance to guilds is really interesting. The highlight for me was the large meeting room on the second level at the front.