Really simple to use. Just uploaded a CSV into the platform for this, set the GEOM from lat/lon I had already configured in columns, and changed the date string into a SQL Data, then simple click interface for creating each visualization. All told took no more than 5 mins for each visualization.
Nice. You're on a pay plan? Which one? I assume you got a lot of traffic from HN.
Nice visualization, btw. It actually shows something, unlike a lot of vizzes.