I'm in the same situation than Catman , in march 2016 I suscribed for one year at NordVPN , remains 2 months but I don't use it anymore since I'm with AirVpn.
Eddie under linux is a great software very useful , connections are fast, solid and very clean (no proxies or black list as with NordVPN ) . AirVPN did a great job, very professionnal , impossible now for me to go back to NordVpn
Anyway I've a Few remarks :
Aivpn is based in Italy ( not the best country for internet freedom)
There is not a lot of country locations and most of them apart to Nato and the fourteen eyes countries ,
Happily there is some switzeland servers with Private Inc Layer who is an isp based both in switzeland and Panama (Other swiss servers have a UK isp ) . I'm using Austrian servers too
Adding some servers in Iceland and Estonia and AirVpn would be perfect !!!
Despite these minor remarks AirVpn is definitively the best VPN i've ever used , I've subsribed for 3 months and I definitively won't go back , thank you for the great Job to all of the team