It's still installing a shunt, but in a prettier package.
The real reason this caught my eye was the easy install. On my van, the battery is underneath the van and not easy to get to wiring under the closet floor. With this device, it can be installed at the battery - just need a short section of negative lead to put this thing in line on the neg side. There is a small wire to the positive battery terminal to get power for the device and to monitor temperature. Since the data is transmitted via bluetooth, there is nothing else to install, no other wires to route inside the van.
So for Winnebago Travato and Era owners, this is a nice, clean easy install under the van.