I got the big one, the 1TB, and it does not appear counterfeit. I have it snugged into the SD slot of my thunderbolt dock on my USB-C MacBook Pro. I figured it would be a good place to stash large files that I only need to access occasionally, and it would take up less desk space than an external drive. May be more reliable, too. The read/write is about 80 MB/s in this setup. Much slower than a typical USB 3.0 external HHD - but, again, I can't even see it. I can also see myself slipping it into my camera when needed.
Is the price worth it? Only if you want the space in a small form factor.