I was told Tommie Tippee bottles are really awesome for transitioning, however, I have never tried this so my advice is not of much help.
We used Dr. Brown bottles with my kids and they did okay. When I would go back to work and the babies had to use bottles it took a while to get them used to the bottles. It was always my husband who would give the bottles, when the mother gives baby bottles, the baby will reject b/c the baby was the mother directly. It sounds harsh, but eventually my babies figured it out and did fine with the bottles. Best of luck with things!!