My DS is 1 next week. I mostly use it in the hip carry, but he will lay back for BF as well. I do find I need to support his head, but thats easy when I can still walk around with a free hand!
I like that I can just pull the hanging bit to tighten it as I'm going. I just pull the rings to loosen it. I find it the easiest out of the ones I've tried. (Only had one other type though, the carrier on the front & cross over back type.
I've also had him sitting at the front of me too.