I'll begin by saying right away that I give five (5) stars to the Fat Guy razor. *****
I have seen the Fat Guy listed as a replica of the 1960 Gillette Fatboy razor, and I can say that it really is. I happen to own a 1960 Gillette Fatboy with a date code is F 2, F for 1960 and 2 for the 2nd quarter. The Fatboy and the Fat Guy look identical, well, 95 to 99 % identical. My only "complaint" about the Fat Guy (and it's not really a complaint), is that it is totally unmarked. There is no identification on it at all. I wish that it said somewhere—on the handle or under the doors or somewhere—that it is the Fat Guy and/or even that it's made in Canada. As it is, anyone picking it up and looking at it might assume that it is an unknown brand, a TTO (twist-to-open) razor made in an unknown country.
It arrived in a sturdy black box. The label on the front said "Fat Guy, Happy Shaving." There was also a label that said "Made in Canada." It was well packed with a piece of foam to keep it from moving around. It contained a 10-pack of Dorco DE razor blades, and according to the label, the Dorco blades are made in Korea.
I have had the Fat Guy razor for a couple of weeks now, and I have compared it to my Gillette Fatboy. I have shaved when I've had light beard growth, medium beard growth, and heavy beard growth. The Fat Guy's adjustments are identical to the Fatboy's adjustments. There's a dial that goes from 1 to 9, with a dot in between each number, and it "clicks" between adjustments, just like the Gillette Fatboy.
As the saying goes, "your mileage may vary" (YMMV), but, for me, the Gillette Fatboy razor and the Fat Guy razor by Replica Razors are identical in the way they shave.
According to what I've read, the Fat Guy razor is just a bit lighter in weight than the original Gillette Fatboy razor. I have a kitchen scale that's fairly accurate, and I got these weights: Fat Guy razor = 2.3 oz. Gillette Fatboy razor = 2.9 oz.
Note: The adjustment numbers are easier to read on my original Fatboy. The numbers on the Fat Guy are lighter. There's a video on YouTube somewhere saying that you can use Testors model paint to make the numbers darker. Maybe I'll do that at some point, for now, it's not a problem.
Note: The bottom knob on my Gillette Fatboy razor was getting hard to turn. Matt Pisarcik, from Razor Emporium, has a video on YouTube showing how to lubricate a TTO razor. I used regular clipper oil. (I have an Andis hair clipper.) I put a drop of oil into the top hole while the doors were open, I put a drop of oil on the two openings of the adjustment dial, I put a drop of oil onto the bottom dial (the one for opening the doors), and I put a drop of oil into the opening at the bottom of the razor. I opened and closed the doors about 10 or 15 times and I turned the adjustment dial about 10 or 15 times, and my Fatboy razor is as good as new. I say all all of this because I assume that the Replica Fat Guy razor—or any TTO razor—might need to be lubricated every once in a while to make it work "as smooth as butter," as Matt said about the newly lubricated Fatboy.
Final thought: If you've always wanted a Gillette Fatboy razor, but if you can't find one in good shape, or if the seller is asking too much money, you really can't go wrong with the Fat Guy razor by Replica Razors of Canada. What's more, it's got a two-year warranty. The company is in Montreal, and their address and website are listed on the box.
Happy shaving!