This is drinking well for a mature, dry Riesling.  Golden in color, clear and bright.  The nose takes a moment then opens to show pineapple and minerals.  On the palate, the pineapple carries thru along with a vegetarian tzimmes (a jewish dish that involves slow cooking root vegetables and fruits).  This has a nice tartness that gives it plenty of energy.  The finish is long but does have a slightly bitter note.  All in all, this is enjoyable and while it improved over a couple of hours with air, I think it is getting ready to start a slow decline.  Still, it should have at least five to seven more years at this level.  A nice wine on its own, it will work better with food.  Pasta (or dumplings) with a cream sauce would be a good match.