It may cut confusion but is 4 times more expensive than a USB-C dock, and the benefit of a Thunderbolt 3 dock over a USB-C dock is very little in most use cases, when you have 4 Thunderbolt 3 ports like on my MacBook Pro.
Used it twice in Beijing, China in the last few months (each a time the 5GB/30 days plan). 1300 (no typo) less expensive than roaming with my French operator. Worked great. Furthermore, no chinese firewall, plus, I was identified as connected from the US (it probably assigned me a US IP).