I have one.
I used it briefly (9-10 rides) on my Fatbike in order to use an Alfine Hub. Despite being a bit put off by the fact that the initial lining-up is done by locking the shells in place with Loctite, it’s a system that seems to work.
Be aware that the BB Shell is larger than a normal one and certain cranks won’t fit over it (I’m guessing old Deore would be a problem). Any SS crank – or one with a removeable inners spider should be fine.
You need a set-up tool for the initial installation. I had to ask them to make one up for my Fatbike (100mm BB see) but it’ll work with smaller BBs too. Do remember to factor in the cost of the tool.
Do you want to buy mine? Make me an offer.