Just to echo 2 of the above posts. I use PIA and it is great, really helpful guides on the website for set up on Enigma and apps for Windows/Android. I'd never used a VPN prior to this subscription but it is all really simple to install and I don't notice that my traffic is going through it (Pings sometime below 30ms in Europe).
And also as Slyuser mentions, check your IPTV, One of my subscriptions doesn't work when I have OpenVPN turned on on my Enigma Box, the other is fine though.