This was a normal bottle, nothing better in my opinion. I bought it for a baby who would rather starve than use an actual bottle. I hoped it would trick him into thinking it was the real thing. But, the shape and feel did nothing different than the dozens of other bottles we tried unfortunately. It was slightly harder to hold since the bottle part was wider than normal bottles and the nipple part was so large. Child's Comfort Again, average with other bottles -- nothing better or worse. Leak Prevention We didn't experience too many leak problems. It might have leaked a tiny bit more than the normal ones since it was so soft. Ease of Cleaning The nipple part was a bit tougher to clean than traditional bottles since it was so soft, but not too difficult. Keeps Air Out Seemed to do a good job keeping the air out. With such a large amount of liquid in the nipple part, that helped. Durability Seemed to be on par with most normal bottles. We washed ours in the dishwasher and never had an degradation problems.