vGIS Team here. Happy to take questions - ask away!
The most common comment is about data quality. Yes, the system is only as accurate as the GIS data fed into the system. That’s been said, the purpose of vGIS is not to replace conventional tools, but to add a complementary system that you can carry on your phone in your pocket. You wouldn’t dig based on vGIS visuals - that will violate all safety protocols (and common sense). However, you’ll use it to help you find assets, understand relationship between assets, collaborate with your coworkers and collect missing data. The system saves locators on average between 12 and 20 hours per month, and 3-5 hours to ordinary users.