I haven't been to Sundmans in many moons, but looking at the scene and buzz in town, they have all but disappeared.
I am taking a few clients and friends to upscale places for lunch in the next few weeks and Sundmans hasn't really even crossed my mind -- I can easily name ten or so places that are more exciting and more highly regarded right now.
CZ has a three-course lunch for 29 euros and Postres a four-course lunch for 29 euros which are both excellent deals.
Cheers,
T.