We have combi fed from the start as top ups due to initial challenges. It works so well for us and my LO transitions smoothly between breast and bottle but I know every baby is different. We use RTF and I go off the weight guide on the back, she currently has 130ml at 9 wks but does then still breastfeed after it. X
I find my baby sleeps a longer stretch when she has a bottle before bed. She is 9 weeks and currently drinks anything between 4-5oz. She also is breastfed so sometimes she has formula and others she has expressed milk, depending on how much I’ve been able to pump. In general my experience has been positive so far!