Unfortunately they'd run out of the khao soi when I arrived just before 5pm on my first visit but I had their Burmese salad (50B) which was fantastic! I wasn't impressed with their mango smoothie (50B) though as it was so thick with ice that it took me about 30 minutes to finish it.
I went back another day at 1pm and had their khao soi (50B) which was really great. Perhaps not as deep and complex in flavour as some of the older traditional places but it's up there with the best I've had and the wonderful setting makes it one of my favourites overall.