If you are in the country already, or about to visit Bali during these aussie school holiday times, I would advise booking ahead if you want to go to the Sarong restaurant in Seminyak. I thought a Sunday night would be a quieter night, and so asked for a 7.30 reservation for 2 people on the 15th July, a week and a half away yet, but no reservations were available except for a 6.30 start. Obviously not fully booked, but shows that maybe even on what you may think is a quieter night, this popular eatery is in demand. FYI.