I purchased some of this about six months ago, it was so gentle on my MBL 1b fine hair. The cost is astronomical for a shampoo but I found it had surprisingly good mileage.
Where I would usually be shedding up to 30 strands in the shower during a wash, the Melu limited this to probably 10! I was pleasantly surprised by how manageable it made my hair at this time, when my bangs (which are the same length as the rest of my hair) tend to tangle terribly.
My hair is very fragile when it's wet and this shampoo seems to coat my strands in some type of protective film while I wash. I love it! Just bought a litre with the pump, will use this on my journey to TBL hair :)