I bought the Tommee Tippee Closer to Nature bottles for when Morgan was born, and had terrible trouble with them! She couldn't keep the teats in her mouth, got milk everywhere, and ended up with horrific colic! When I asked the midwife and then the HV about it, they both said that virtually every mum they had spoken to about these bottles had trouble with them, and said they were even writing to Tommee Tippee to complain!!
Then, after reading several threads on here, we switched to Dr Browns bottles when Morgan was a few weeks old, and have never looked back! They really are amazing! Her colic disappeared almost instantly and was far, far more settled.
OK, so they take a bit longer to clean cuz of the extra couple of parts, and they are a bit more expensive than some other brands, but I can honestly say it's worth the extra time and cost!