Auntie, I can feel your worry lah, first time mom nak balik kerja memang stressful! The 1:2 ratio you're asking for is really important, and honestly, you should call a few centres directly to confirm their actual numbers sebab sometimes marketing claims differ from reality. A few of us in the mum group tanya the supervisors sendiri during visits, and some centres memang lebih transparent than others. Since you're between Wangsa Maju and KLCC, maybe try asking your gynae or paediatrician for local referrals, they usually have a better sense of which places maintain good standards. Jangan stress, you'll find the right fit, and it's good you're planning early!