I too love Bamboo. Our Walmart will get it when pigs fly from the depths of a place that recently froze over.
Anyway, I've machine and hand quilted it. I find it's low scrim is perfect when I feel it as I go. The first time I used it, I told dh I wasn't sure why they made a batting that felt so nice you could just wrap yourself up in it. I was drawn to it because I saw it advertised that it will reflect your own warmth in the winter and repel it in the summer therefore heating or cooling the user of the quilt. At first, I thought it was malarky, but it's similar advertising used to vend bamboo wood flooring.
I have now inherited the quilt I made for my Gramma back. It's 54 inches square and I used it to cover up with at work because it was so cold. I couldn't believe how warm I felt! I don't prewash my batting either, but it seemed to shrink less than other batts I've used. I love it and buy it every chance I get.