I was a bit hesitant getting the bamboo model because there weren't any proper sound demos available at the time of purchase. I got the bamboo for two reasons: one is that it seems to be more resistant to dry winter conditions than many other woods, other is that is environmentally more sustainable. It also looks really nice.
I'm glad I bought it, the sound was actually better than expected. Even volume on every string, no buzzing, and it sounds even better when plugged in (straight into mixer). It's also really nice played acoustically which is how I play it most of the time.
The polyurethane strings can get sticky but if you don't like them you can always replace them. I love them for their sound.