I live in England, UK.
Started using Tommee Tippee Closer to nature, because I was intending to breast feed and my husband do one feed with the bottle. However, that didn't work out and I used bottles from about day 3 onwards. They were OK until she was about 15 weeks old and decided she didn't want to feed and screamed every time the bottle came anywhere near her. This was for about 3 weeks (have posted elsewhere about this). Then I asked a friend about the bottles she's used and borrowed hers. So now we use the Playtex bottles. The person before me talks about them too.
Pros: The bottles are hollow and you put a pre-sterilised plastic liner inside them, which contract as the milk is sucked out of them. This is supposed to mean less air all round. We have certainly found that and as soon as we switched her feeding was fine again. She is much less windy now and isn't as sick as she used to be either. Wouldn't recommend the TT closer to nature, but will definitely be recommending the Playtex bottles to all who want to bottle feed. You don't need to sterilise the bottles themselves, but just the teats and teat covers and ring the teat goes into.
Cons: Unfortunately we can only buy them online in the UK. Which is a pain with the liners, but now that we've decided to stick with them, we ordered about 5 months worth. The bottles only go up to 8ozs. The TT closer to nature ones go up to 9ozs. However, Alice isn't a big feeder anyway, so this isn't a problem for us, but could be for someone who is a big eater.