Lok Yu is one of my family's favourite Chinese family restaurants to go to for all occasions. They have a wide variety of menu items and service is fairly friendly.
Standouts include the "Oil-Drizzled Chicken" which is moist chicken with crispy skin doused with a mixture of soy sauce and oil with scallions and Chilis scattered on top of it. Their scallop with garlic and vermicelli noodles is awesome, as is their Clay Pot Rice (I particularly like it with the Chinese sausages and preserved meats, the lap Cheung is wonderful). For the Clay Pot Rice it takes at least half an hour to make so order it right when you get in if you want it.
Be warned they are super busy on the weekends and can run out of their items... That's the major reason why I can't give them 5/5. Make sure you reserve in advance for bigger parties and see if you can reserve menu items as well!