Yep it is a minefield out there. I would advise against using Baby Bjorn type carriers as they become uncomfortable for you once baby is bigger and the forward facing position isn't ideal for babies hips or spine (www.didymos.com has a nice explanation of why not). But if you think about it baby is going to be hanging by his or her bits. The best options for an ergonmically designed sling are the ergo (don't buy off ebay). Have you thought about a manduca or the boba 3g? Both are used from birth through to toddlerhood. My 23motnh old toddler fits in the manduca arms in as it has a zip to make it grow about 3 inches. Have a look here: http://www.precious-bundle.co.uk/default/baby-carrier-wraps-slings-types-1/buckle-and-hip-baby-carriers.html?limit=all Also the moby is a good option for tiny babies but again as they get bigger (by about 20lb uncomfortable) consider switiching to woven wrap as they are more supportive and will last longer. Tip with the moby is tie it tighter than you think you will need to begin with as the stretch means you'll be able to get them in.
