I have used a bamboo/cotton blend batting but it was made by Pellon. I liked the way it quilted. I have since discovered more about bamboo though (see Prism's post above) and will not buy it again. I liked it, but not so much to outweigh environmental factors and ... I discovered Wool.
Wool is now my preferred batting.
It's wonderful though that Mt. Mist was willing to work with you!! Well done!!