I haven't tried any other Malaysian restaurants in the Seattle area except the Malaysian Satay Hut. The service is not exceptional or anything, but the food is definitely very flavorful.
My favorite dishes there are the Hainese Chicken (steamed chicken with soy sauce and cucumber), the String Beans (comes with shrimp and sautéed in shrimp and chili paste), and of course the roti (a version of nan bread, but a bit lighter and thinner, served with curry on the side). If you like sweet and sour dishes, try their shrimp with mango, served in a mango. The food there is pretty consistent, I don't think I remember any bad dishes there.
The downside? Like any other good restaurants out there in the ID, it just gets very crowded during then lunch and dinner rush. They also have another location in Bellevue and I if you can beat the crowd, I highly recommend this place!