My last quilt was made using Bamboo batting, and although it felt nice and soft, I found it "flimsy", or not enough "beef" to it like cotton, cotton blends or wool. Also, my daughter and husband found it too "light" in weight, and not warm enough....I have to agree. But that may just be a matter of getting used to it or finding another brand.
I may try it again, for a summer quilt, because it does needle very nicely.