WAN Link Load Balancing in v20

Question

What is everyone's experience with WAN link load balancing in v20? We're a K12 private school with two identical WAN links from different ISPs, Frontier and Comcast. Our goal is to enable WAN link load balancing in an active-active config, weight 1 and 1. 
 Sophos support claims that the sessions are load balanced and shouldn't cause an issue with students being constantly moved from one ISP to the other. If they were, then this could cause issues with applications staying logged-in. 
 Has anyone had any success stories in schools using WAN link load balancing? Did it work differently in v19 than in v20? Is it much improved?

Mayur Makvana · Answer

Hello Nathan, 
 Thank you for contacting Sophos Community! 
 You can review what method set on your device by executing the below command from the console. 
 console> show routing wan-load-balancing 
 You may refer to the below KBA for more details. 
 https://docs.sophos.com/nsg/sophos-firewall/20.0/Help/en-us/webhelp/onlinehelp/AdministratorHelp/Routing/Gateways/RoutingLoadBalancingWeights/index.html 
 Opting for the session persistent will have better user experience.