Setting up VPN services on a router requires a deep knowledge of network security and careful installation. Minor misconfiguration of VPN connections can leave the network vulnerable. Performance will vary depending on the ISP.[citation needed] When you’re using a VPN, it’s difficult for others to snoop on your web-browsing activity. Only you, the VPN service, and the website you’re visiting will know what you’re up to.  478,623 56.16 GB Japan Eric ( 10 sessions In February 2018, a security researcher discovered an information disclosure bug in the app that results in a leak of user data, such as in which country the user is located, and the user's Wi-Fi network name, if connected.[27]