Tholl is a tiny, spotlessly clean restaurant run by a friendly and enthusiastic Austrian. Only about 6 tables so booking advised, although it does not seem that well-known. For once in Austria the spicy stuff is really spicy - these are marked in the menu with 3 chillies for the safety of the Warmduschers. Recommend the spicy beef curry made with really tender bits of boiled beef, and the chicken satay starters.