I did extensive research on this brand of bamboo fencing and did not find any worries.  I bought three boxes of the mahogany stained version.  They were stunning.  I kept the boxes in my living room until my contractor could install them outside.  Meanwhile, I could hear very loud snaps and cracks emanating from the boxes.  When I opened them, I saw that all of the bamboo was badly split and cracked.  I don't think they will last very long, because they are still splitting and cracking.  The loud snaps and pops never stop.  The bamboo is on a fast and furious self-destruction mission.  

It is probable that this is a function of my living in a very dry climate.  Perhaps they will do better in humidity, but the cold and dry Colorado autumn is decimating the bamboo.  Too bad, because I love how they look.