Review: I think the previous reviews were a little harsh. Indeed, Aum is nothing extraordinary, but with all the books(Buddhist I think, but I didn't check) it does feel like a genuine Thai vegetarian Buddhist restaurant, though it clearly caters mostly to a tourist/expat market. Food was standard Thai fare, but cheap and delicious, with a range of fresh juices available as well. Staff were friendly but stayed out the back so I hardly saw them; I had to ring the bell to pay! Aum will not be the best or most memorable meal you have in Chiang Mai, but if you want a cheap, healthy, filling meal, right in the centre, you can't go wrong with Aum. When I was in Chiang Mai two years ago (before I knew about the happy cow) I ate there nearly every day because it was up the road from my guesthouse.