I just bought one 3 weeks ago and will transfer a NUC to it in a week or so.
I bought mine on Ali Express and it is called an Automatic Hive.......I was not aware I was buying a knock off when I bought it.
You can buy one from Ali Express for 368.00 USD delivered by DHL, WHICH IS 1/2 price of the one that says Flow on it.
Flow will try to tell you the plastic is not Food Grade but in fact it definitely IS Food Grade plastic in the Flow Frames.......I have a certified copy of the test report if anyone wants to see it.
This is my first Hive and I will see how it goes, if it works as advertised, I think I will go to 3 hives.
It is a good idea, to rub beeswax on the plastic Flow Frames, just rub a block on the faces, it will grate off bits of wax like a cheese grater and spray them with sugar water to help coax the bees to use them.
I will post my progress with this.