I've been working with them for almost 2 years now, they have helped us to get insights of our visitors behavior in different countries as well analyze how much traffic we are getting from each market segment (mobile vs desktop etc.).
The support team has always done their best at helping out whenever there's an issue or question - which makes it very easy having your website up & running! No major issues so far but honestly this might be because my business isn't that big yet :) We're able t keep track about what markets do most visits via specific keywords/search terms when looking into analytics reports using exactvisitors API integration toolkit. In addition, being part of one unified database allows you not only see all data related marketing activities together but also use advanced filters such as country-level ones if needed too.