I see a lot of talk about people using VPNs. I am wondering if it is something I would benefit on using. Background, I have a home PC and a NAS, with an ASUS AC66U router (which does VPN). I am an airline pilot, on the road a lot with my MacBook Air, using free wifi's at hotels. Would a VPN be something I should be using to ensure safe/secure connections with on hotel wifi's?