I can't rate this highly enough. With a small, colicky and refluxy baby who insists on being held upright all day, I was desperate for something to hold him securely and comfortably, whilst freeing up my arms and relieving the stress on my back. We had tried a Baby Bjorn carrier which somehow wasn't comfortable for him being so small.
I had been anxious about trying a fabric wrap in case it wasn't secure and it looked complicated to use. I need not have worried - this wrap is easy to tie, and I feel he is safe in it. It's a lovely soft yet sturdy fabric, and as it's just a long length of fabric, it will fit all people. Once tied, I can keep it on and slip him in and out of it as necessary without untying/retying it. He seems to fall asleep in it quite quickly when I move around with him in the wrap, and is a useful way of dealing with the overtired inconsolable crying which we sometimes get.
The way it is tied uses your whole back, making it more comfy than some other slings I've tried, and I can wear it for a number of hours quite easily.
The only slight niggle is the head support - until the baby can support his own head, you have to tuck it under one of the side "arms", which he doesn't like when awake as he can't see and his head is not in the neutral position, so I support it with one hand until he falls asleep. Once asleep though he seems pretty comfy with his head tucked in as recommended.
I'm really glad I bought this wrap, especially as he won't grow out of it for a while (30lbs apparently). The chocolate colour is richly beautiful too.