The KeepGo LifeTime world HotSpot service is pricy, but worth it in the right circumstances. My testing was limited to one location for now. However, the service works as advertised so far, and the speeds are what I expected when I placed my order.
Though not advertised, it is possible to use the hotSpot device over USB with wi-fi disabled, and without inserting the battery, which is my preferred use case. The hotSpot device does not seem to like being used on a single built-in USB3 port. Using the device on a shared USB3 port, or through a bus powered or externally powered hub seems to make it play nice with the PC.