Frequent connection drops that force me to change servers. It says it's still connected but I can't open a single website unless I swap servers. Also occasionally it just logs me off and asks for credentials or I get pop up window to provide those when it attempts to connect to VPN server. I can't just log out and stay logged out, because after restarting the browser it logs me back in. I had to reinstall the addon to temporarily solve some of those issues. Can't depend on it because of the frequency of the issues and how long it takes to resolve those.