Are you looking for somewhere for a quick coffee and cake in the town centre? There are a few nice little places, including this one right near Marktplatz.
Doessegger has been around for years and is always popular and busy. Now that the sun is out, they have just started putting chairs outside. So if you have a spare 20 minutes and fancy a rest from shopping this is a good choice. Service is really quick and friendly, and the cakes are great. Order your cake at the counter on the way in and then find a seat.
My minor disappointment is that the selection is always limited compared to other places, but the quality is really good and always very fresh.