I love, love, love my adjustable fleece pouch from Kangaroo Korner. It is so cozy and comfortable. C gets in it, and she just goes right to sleep. Unfortunately, this is how I hurt my back at the museum on Sunday - we were just so comfy I couldn't bear to put her back in the stroller, so I wore her too long, and my back hurts the exact same way it did when I was pregnant. How often do you find a baby-carrier that you don't want to take off? It really is like a womb with a view. She gets all curled up in the fetal position, snuggles her head in next to my heart, and zonks right out. This frees me up to have two hands to chase her sister with. Anything that allows me to have free hands is a very good thing.
They're not cheap, but they're so worth it. I'm waiting on a lighter weight one (for summer). It should be here in a few days. YAY!