We actually can't give a full review of Tian, because never managed to place an order. After 45 minutes we had only tap water and a complimentary shot of "anti-alcoholic grape juice". The portions looked small, beautiful but with prices that just didn't make sense. Again we weren't actually able to TRY the food, because after said 45 minutes we decided to leave - the staff seemed really stuffy and pompous, almost as if they wanted to prove that a vegetarian restaurant could be as pretentious as any other Viennese restaurant. Possibly the food is quite good, but if you decide to go here, don't make other plans and make sure your credit line isn't maxed out, and maybe bring a book for the wait.
Cons: Service, Price