We've been using this plugin for nine months with no issues.
We use it integrated with FormidablePro to display map locations from a user-community, crowdsourced contributed data set.
The maps display data from a live FormidablePro data table.
Implementation details on "how to" are in the FormidablePro user forums.
The combination of Comprehensive Google Map Plugin and FormidablePro enabled us to redesign from 28 sites down to one with increased functionality and improved UX.
The Comprehensive Google Map Plugin is powerful, flexible and feature-rich.
Alexander's support is among the best, ever.
This plugin is highly recommended and very worthy of a meaningful contribution.