As a mother of two young kids who used Dr. Browns bottles from birth to age one I can state with confidence that these bottles are worth the price and extra clean up. My mother recommended I try them out because she used them for my nephews and loved them, so I knew I had to try them because moms know best! I have heard horror stories about moms having to switch from bottle to bottle because their kids wont take them. Both of my kids easily took to the bottles. The only reason I give 4 stars is because the bottles have extra pieces that require additional cleaning....but trust me it is worth it. They sell a dish washing tray that holds the pieces perfectly and makes clean up easier. The bottles lasted the entire year and did not need replacement. These are high quality and a great investment. If I have another, they will be the bottle of choice for me.