Pros: All organic, easy to use and move
As wel, the Tres Tria can be used in the middle of the bed. We first used it to divide the bed between DH and DS (3yo) on one side and DD (newborn) and me on the other. Now that DD is a little older, we can put the Tres Tria on the outside to prevent her from rolling off. Even while I was pregnant, I found I could easily roll/climb over the Tres Tria myself to get up, but a child lying near it couldn't get over it.
My older children have all loved the Tres Tria and often prefer it for a sleeping pillow over the others available. It has a great feel, no noticeable odor, and is very versatile. It's the perfect addition to our organic family bed.