Hi my DD is the same size and weight as your and I love my Ergo. I got it maybe 3mths ago and haven't gone a day without using it. i usually use the back carry but have just perfected the hip carry and it is super easy. I use the hip carry more for when we are somewhere standing still and I don't want her running around, church, talking to another mum at preschool but it isn't as comfy as the back carry for things like shopping trips and walking. She is pretty much weight less in the back carry

It is fairly easy to switch between frong and back and I'm sure the DVD had instructions to switch between hip and back but I would have to check.

My only regret is that I spent $300 on a pram :-)