I never see before this OS, it is simple OS for HP blade switches. I used only old version, 5.1
There is 6.3 now. It`s interesting mix from Extreme OS (spanning-tree group, some familiar forms in the
command menu) and JunOS (check and aplly config, yes!).
Also, it have useful web-interface (oh,miracle!)
It is so simple for some difficult tasks, but for his tasks (only blade switch) it is good.