Hi,

I have and Ergo, and we love it. Once bubs gets to that size, the back carry is the one thats recommended, and it's best for your back. I spoke to someone who sells it and she said that the hip carry is not great when they get bigger (especially for long periods) We mainly use that back carry (my son is about 9kgs) and he loves it and he can look around more. TBH, I have never used the hip carry, couldn't be bothered getting out the dvd to work it out, but I know you have to unclip the straps and swap them around.

HTH