If you're going here for the first time, write down the phone number and once you are in a cab dial it and their staff will explain the rest to the driver. They are obviously used to people having trouble getting there, after I called to make a reservation they send me a text message with a description to the restaurant, unprompted.
They do have a second branch right outside the east gate of worker's stadium, which is easier to find but I prefer the original one. The decor is unique and beautiful and I like the fact that it is hidden inside an old Beijing residential compound.
The menu comes with English translations and photos so if you don't read or speak Chinese you will still be able to make easy choices. I assume staff also speaks some English. Like most vegetarian restaurants in Beijing Lotus in Moonlight relies heavily on mockmeat dishes, I wish they had some more vegetable choices but this is the case for almost all vegetarian restaurants I go to. The service is attentive and friendly here, the food ranges from delicious (their Jiaozi are great, also Tofu in Sesame Sauce) to average. The soup with meat balls we tried was tasty but the meatballs were really chewy. My girl-friend actually gave up on them. Prices are moderate for a vegetarian restaurant, and that is exactly where I would place Lotus in Moonlight: Food quality is slightly lower than Pure Lotus but it is also half the price and in general a bit more down to earth. With its dim lights and beautiful soothing music, it was the perfect location for our date last night, will definitely be back.
Cons: dishes not always great, hard to find