I’m very sorry to hear this, and deepest condolences to Chrissy. I purchased their TC three weeks ago and Have found it very worthwhile. Very few accessories make much difference to my system (which I bought instead of a Porsche, ,rueful grin), but this one did. And it hasn’t even thoroughly broken in yet. Everything I’ve listened to since applying it just sounds more like real music. I have a lot of left in the syringe, it goes a long way, and will spend next weekend applying it everywhere else I can think of.
The website such as it still is is marked “coming soon.” I hope that means the rest of their products with come back available. I will be jumping to get them.