Aloha Mauidji - I am still waiting on delivery of the MMF CAST cables. It's been a month now! I needed 10m pair...so I guess that entails a custom order at the Nordost plant. Anyway, dealer tells me I should have them in a couple weeks.
Some on Agon rave about the MMF and others seem to simply have an aversion to anything Nordost. However, I have not found anyone who has really listened to the latest MMF CAST cables and not been a fan. As you would imagine, Krell claims the MMF cable is far superior to their prior CAST offerings. The story is actually kinda interesting. I will paraphrase below ....
With the original CAST cables, Dan D (former head of Krell) believed that he had invented a new cable paradigm (current vs voltage) that would serve as a bit of an "FU" to the high end audiophile cable industry. Nordost and several other manufactures were qualified to make the first two versions of CAST cables. Then, several years later, Nordost approached Krell with a prototype of the current "MMF" CAST cable....and upon listening, Krell decided that it was indeed superior to their prior CAST offerings.
For me, the proof will be in the pudding. I'll let you know my own detailed thoughts on the MMF cables in a couple weeks. Stay tuned.