Has anyone used the Balboa Ring Sling: https://www.balboababy.com/product-tabs.asp?cat=1

A friend has one and she is ALWAYS wearing her baby, it looks easy enough to use. I've looked at some of the other ring sling options and this one appeals to me the most because it looks like more of a structured carrier that I can figure out how to use (some of the fabric ones look complicated). I currently have an ErgoBaby and the K'Tan and love them for their ease of use.

Anyone have any pros/cons or experiences to share with the Balboa Ring Sling?