The only thing we don't like with most self-driven car hires in Manila is they require you to leave your passport with them (especially if you're a foreigner). They would not accept photocopies of it either. Good thing we don't have to hire a car anymore. Last time we were in Manila, we borrowed one of my aunt's cars. Next time we go back, there'll be plenty of options from my family.
I have never been asked to leave my passport when renting a car. I rent at the airport each time we visit. EuRopcar. I would never leave my passport with anyone like this.