I can't recommend Tamarind highly enough! The food was delicious and a great way of trying out a variety of Lao cuisines. The waiters were really friendly and explained each dish in detail and how to eat it according to Lao customs and etiquette. The experience here was also great - we had a table by the river and never felt rushed, which amazed us for somewhere so popular. It's necessary to book in advance. I only wish I'd been organised enough to book their cooking course but it was already booked out for days ahead. Yes it is expensive by Lao standards but for the quality of food it is worth every penny.