My breastfed baby took the wide neck bottles okay, but she actually prefers the standard Dr. Browns bottle and nipples. Something to keep in mind with the wide neck bottles is that the nipple is REALLY long, so for newborns it may go too far back in their mouth. My little one gagged as they were too long. She has done much better with the standard nipples. I had no issues with leaking.
Not sure why people like Dr Brown bottles. They leak, there are too many parts to clean, the side with the measurments is too difficult to read. WhatI have learned is that ALL babies will have gas and NO one bottle will prevent that. So go with the simplest and easiest bottle.
The playtex vent aire are also a pain for the same reasons as the Dr. Browns.
My favorites are Medela, First Essentials, and Evenflo. They are simple to use, easy to clean and no leaks!!
Dr Browns baby bottles patented Natural Flow® vent design allows your baby to nurse without fighting the negative effects of a vacuum or the discomfort of ingesting air bubbles. This helps relieve your baby’s suffering from an upset tummy, colic, excessive wind or gas, or spit-up. The free flow of milk from the positive pressure at the nipple also eliminates nipple collapse, and can help reduce the build up of fluid in your baby's ear.
I recently switched to Dr Browns bottles at the reccomendation of my friend. I was using the Medela bottle/nippes that came with my breast pump and my baby had a ton of trapped gas.
Whatever the science is... it works. While my 10 week baby still tries to chug down his daily bottle his gas is much more controlled (still have to burp him once or twice).
The major downside is all the parts to the bottle- it makes cleaning them a pain in the butt- but worth it for me!