If you can breast feed exclusively its sooo much easier. My boy has some feeding problems, and combined with that my milk took ages to come in when we were in hospital (I think because all the nurses were feeding him and I wasnt allowed to even bottle feed him myself) so despite trying loads we went home with a bottle fed formula baby.
Ive been trying still with the breast feeding and made some progress with nipple shield, but my milk supply really started to slow down over the last week. Im not using the breast pump like a nutter and taking fenugreek supplements to buy us more time. In short, its not easy combination feeding and its certainly not a situation I would choose to be in, there is no conveniece you end up with the worst of both world, having to sterilise, spend on formula, prepare feeds etc.. use the breast pump 6 times a day and provide lots of opportunities for BFing, there is no time for anything else! Its bloomin hard work. At the moment I have no idea why someone who could breastfeed wouldnt, I cant wait for the day I can put the bottles away! And in the night I imagine it must be so nice to just cosy up on a chair and breast feed, instead of going down to the kitchen in the cold to prepare a feed.