I went back to work full time when DS was 9 months old, and at first I was a little concerned how he would go being in creche full time. I was lucky that he adapted really well and has now been going for the past two years. The extra money has helped us do rennovations on our house that would have taken much longer if we only had one wage. That being said, I am not sure that I will be returning to work FT after Beany is born as the cost of having two kids in FT child care would not be worth it.
If it's any consolation, my friend recently returned to work 6 months after having her 3rd baby who she is still BF. He has a bottle while in care and she BF him the rest of the time. It seems to be working for her.