New Moon is one of my favourite places to have dim sum in Perth. It's somewhere I've been for dim sum for lunch and dinner several times, but have yet to blog about it. Located along James Street in Northbridge, at one of the busiest parts of Northbridge, it's definitely a very popular restaurant for dim sum. It's not unusual to find several groups of people waiting outside the restaurant for a table after 11am on the weekend.
While the service is not noteworthy (most Chinese restaurants are not), the service is quick and the prices reasonable. If you're not familiar with dim sum or if you haven't tried dim sum at New Moon, then I would highly suggest you give it a shot. It's also one of the rare places that has dim sum at night (I believe only on Fridays if I remember correctly).