It makes more sense if you are used to Ubiquiti ecosystem. Basically they assume you have Ubiquiti-based home/office network (they call it site). Then this device binds to this site and VPNs to it over Teleport (kinda similar thing to Tailscale, also built on top of wireguard). I would assume you can also configure Wireguard/Open VPN/IPsec manually as this is pretty standard in their ecosystem.
I guess it's nice if you are in Ubiquiti ecosystem already and want as little friction as possible. Otherwise it's probably similar to any travel router.
WAN connectivity via USB tethering and ethernet, not just wifi?
The blog has almost no details, but the product page is also pretty light on technical details.
The competition (I use GL-MT3000) is pretty strong.