I was going to stay out of this but here is my 2 cents.
I buy from just about every vendor out there. Who ever has what I need that is where I go. I have bought lots of stuff off Don with never a problem.
He was one of the first resin casters I meet when I got back into the hobby around 6 or 7 years ago. Out of the blue he called me to just give advise on a build all those years ago and we still keep in touch even if my project is not using any of his product.
I have only been burned once by a vendor, that same vendor has his fans here that sware by him. He has lost me as a customer but still has others that like him.
I think some here have personal axe to grind while others have every right to be upset.
Me, I am getting ready to order 2 more bodies from Don to add to my collection.