Honestly momshie, I haven't personally given birth sa Unihealth or Olivarez kaya hindi ako makakapag-compare ng firsthand, but a few of my mum friends who delivered sa Olivarez loved the cleanliness and the staff were really attentive, though one mentioned it can get crowded during peak hours. I'd suggest calling both hospitals directly para makakuha ng tours, or better yet, ask around sa local mom groups here sa inyong area kasi ang experience talaga ay nagbabago depending sa which branch at shift! Which part ng Metro kayo, or province pa?