I ordered it on September 12th, but I finally got it today. The filming to use this product is already finished. They said they sent it late because they were out of stock, but shouldn't they have sent it by FedEx as much as they did? I will never order here again.
Great sturdy (unlike some other ones) height adjustable rail support and QR baseplate. The height adjusting part is not just a single screw, but two vertical (integrated) 15mm(?) rods, making it very strong. Works great with the BMPCC4k + rigging.