I tried the bamboo bar one time, and thought it was pretty silly. Then I watched an Eric Spoto video, he did them, so I tried them again. Second in a workout, after regular, heavier bench presses. The weight is light, so you don't get beat up, and you can really fine tune your groove without blowing up shoulders and elbows. It was so normal for me to bench then hit some dumbbell benches that the bamboo bar was a great "new" exercise.
I agree about less bar weight, more hanging weight. The bamboo bar is just a stick, so it weighs almost nothing. You need more crazy load. Also hanging multiple small weights per side makes the bar jump around more than a single, heavier weight per side.
After a couple months the newness and coolness kinda wore off. This week I put a chain on each side of my normal barbell bench. It felt like a totally new exercise. Less chaotic, but a different "challenge." Cool stuff.