We use breastflow with Freddie. He used to have both breastflow and TT but he started refusing the TT ones just before he was 4 weeks old. Hes fine with the breastflow and is being put to the breast now as well ans has taken to it perfectly so big thumbs up from me, this is a baby who has been exclusively fed from bottles with EBM til he was 5 weeks old and wasnt once latched on the breast til this point but latched on first go when the breast was offered!