Jeepney Grill is good and I also like Barrio Fiesta in the Vermont area if it's still there. I grew up in the philippines and Barrio Fiesta is pretty close to authentic, however, Jeepney Grill is great too.
Filipino food is OK, but not fantastic compared to other Asian food. Avoid the dinuguan, which is called Chocolate pork, because it's really pig entrails cooked in cow's blood. The safer bets are adobo, pancit and anything barbecued. Have fun trying!