Merzbow "Nine Studies of Ephemeral Resonance Volumes 1–9" 9CD box set finally listened! It was 2-4 discs per day, and not bored at all. There are number of discs where I could say that crackling piano impro moments not ideal and some moments where you got "bitcrush" distortion happening. Yet, all those are just minutes within nine CD full length of good stuff. There is moments of kind of things fits to Merzbow's "I'm building this thing here..." -method, where noise itself is kind of blunt and simple. If it was done by newbie, you'd be tempted to suggest a bit more heavier or better sounding and get it going, but Merzbow clearly COULD do it, but wants to do something like this, so there will follow total fireworks later on.
If one has money to only buy one box of Merzbow, it should be probably Merzbox, Metalvelodrome or perhaps even "Merzphysics" 10 x CD box. But if you have enough funds to get more, this 9xCD certainly is different from all mentioned ones. Good, but different enough to justify its place at your shelves!