We've had these bottles for a while now. They are wonderful! Our little one prefers this bottle and nipple over others and drinks perfectly fine with them. They hold the perfect amount of milk and aren't awkwardly shaped. Overall, a good buy!
They provide a wide latch, which allows our baby to easily switch from breastfeeding to bottle feeding without any nipple confusion. Also these are the only bottles that don't make my baby choke.
I'm an adult reviewing a baby's product - so your kid may or may not like it - but from my perspective these are great. Wide top - easy to clean or spoon formula in. Nipple has a good seal - just make sure you pull it tight through the ring till it pops - I've never had any leaks or had to deal with twisting and aligning the top.
The price is awesome, and the baby loves them - they just simply work. Getting powdered formula in them is easy peasy, and they are easy to wash.
My baby loves Avent Natural bottles. The nipples are firm and don't bend in the mouth like the other I have does. Rarely does milk leak out of baby's side of mouth when I use this bottle. They're also easy to clean. What more could I have asked for?