After managing to reserve a table a this hot spot we finally had dinner at the Mochi yesterday. Enjoying the privilege of sitting outside (they keep a table for you inside and outside if you have a reservation), we ordered three courses: Kim Chi, Mochi for Two and of course Mochi for dessert. Since we had Mochi for Two, the main course was split into 3 courses, I guess mainly to keep everything as fresh as possible considering the outside temperature of well above 30° Celcius (86° Fahrenheit). After the good and quite spicy Kim Chi salad we were both blown away by the variety of nagiri, sashimi and maki. Both the fish and the rice were of highest quality. The dessert also exceeded our by then very high expectations.
If you plan to visit Vienna, don't forget to reserve a table at the Mochi at least 4 weeks ahead of your stay. Otherwise you can always try to be lucky and wait for the next table to be free.