I'll second this recommendation. Mrs999 and I had dinner there recently and were very pleased; it is what it is. The 'non-touristy' element is emphasised by the fact that some menu items -- food and wine -- are discounted for customers who have an S-kortti (which, for those who don't know, is one of the major Finnish 'loyalty' cards.)

The following day we had lunch at CD. I would recommend it for anyone who is (as we were) curious about the 2-star experience -- but we won't be going back any time soon. Maybe my expectations were too high, but (a) service was decidedly casual and (b) we have had better food at 1-star restaurants in Paris.

cheers,

Henry