I've made tons of bows using bamboo flooring. It's good for cores and bellies. Never had a problem with it. Terrible for backings though for reasons stated above by Blackhawk. I've backed it with ash, hickory, maple, and standard bamboo backings and they've made nice bows. Got anywhere from 25#'s -75#'s depending on how thick I cut the flooring. It even makes nice handle risers as well. As long as you have a good backing, I say go for it!!!
G