Pros: available through mainstream outlets (ie Amazon)
Cons: Little too stretchy
I registered for this wrap when I was expecting my first child, before I knew anything about being a mom or babywearing. Dd turned out to be very fussy, and I wound up wearing her in this sling almost all day, every day for her first three months. It was easy to learn, and the stretchiness helped to compensate for my then underdeveloped wrap techniques. I have very fond memories of having dd tucked in there; it was one of the surefire ways to calm her, or, at least, help us both feel connected.
As dd grew, the wrap became somewhat uncomfortable and unsupportive. I felt better moving her from it into a mei tai once she was big enough.