There is a type of Chinese cuisine in Manila that I haven't seen in North American Chinatowns. It is Amoy Chinese food. It shares many nomenclatures with Taiwanese food but the preparation is quite different. Man Han, with branches in Quezon City and Makati, is perhaps the best place to sample this cuisine. Ha Yuan is also good. Then there are individual restaurants in Chinatown that are good for particular dishes-- Ma Kong for chicken butt noodle soup (mami,) New Manosa for Lo Mi and stuffed prawn, Tang Qiao for Ma Ki, Panciteria Peace for stewed pork leg.
These are some dishes to try:
Lumpia (egg roll) is quite different from all other egg rolls, quite delicious and healthful. It is like a burrito stuffed with a melange of shredded veggies, tofu, meat, shrimp, ground peanuts etc.
Ma Chang. Steamed bamboo leaf wrapped glutinous rice with pork belly, sausage, mushrooms, dried shrimp. The oil from the chunks of pork belly infuses the dish with a fragrance and flavor that makes it different (better) than Cantonese or Shanghai versions of leaf wrapped glutinous rice.
Lo Mi. Udon like noodles in a thick soup made with shrimp, pork, mushrooms, cabbage, shallots etc.
Diok Pit He. Deep fried stuffed prawns wrapped in a pork stomach "webbing."
Ma Ki. The same characters as Taiwanese Rou Geng but tastes very different. Gingery chunks of beef or pork in a glistening thickened soup.
Pork Leg Cha Bihon. The chunks of pork leg makes this fried rice vermicelli dish fantastic.
O Chien. Oyster omelette. Unlike Taiwanese version, the use of chives gives it a great flavor.
Ngo Hiong Keng. Similar but better than Taiwanese Chicken rolls.
The restaurants I've mentioned above are every day lunch places and the dishes are priced accordingly. While Man Han and Ha Yuan are clean and comfortable eating places, the others are very much less so :-)