Every baby is different so you don't know how yours is going to be until it happens. My bub was on BM for a week then had to be on EBM exclusively for 2 weeks - very, very damaged nipples - and was then back on the boob with the occasional bottle. She was absolutely fine with it. Yet I know other babes who would not handle this at all! I think what helped (possibly, who knows??) was having a bottle that resembled the breast as closely as possible. I am in love with the Adiri Natural Nurser. It is certainly worth checking out. The best part is it contains no bpa, phthalate plasticisers, latex, or vinyl chloride!!
Best of luck!!