Looks like a great product, however the Thunderbolt interface seems overpowered to the task of running a SATA drive, so doesn't strike me as a great value at retail.
I've been using USB drives for less than half the price per TB storage.
I don't want to discourage anyone from spending the money on great gear, but it's not something that's made itself a priority to me yet.
I do have a thunderbolt 4 hub, and the notion of daisy chaining several of these is appealing in terms of reliability,
but I don't prefer to leave mechanical drives spinning all the time, or even plugged in, as they are noisy, and draw more power than SSD. I just don't require that much data to be immediately accessible from spinning rust. Currently have a 4tb, and 3 1tb SSD's hooked up, so I have plenty of workspace, and a large "iTunes" directory, and then some.
I use an indexing program that keeps the catalogs of all the drives in my storage drawer, so i can find a file before I plug in the appropriate hard drive, whenever I need anything offline.
https://cdfinder.de/Looks like my stock cheap USB drive reads and writes about 145 MB/s, a cheap SATA SSD in a USB-3 case reads at 389/writes at 409...
A NVME blade in a USB-C case gives me 739/791, and the same NVME SSD in a thunderbolt case from OWC gives 1646/1108. My mac Mini internal SSD is over 3000 for both.
The G-Drive only does 250... so it's not what I'd call a performance device at this time.