Works as advertised

Purchased a lifetime premium account from StackSocial and had no problems setting up the PPTP VPN on my iPhone 6s and iPad Air and my iMac (2009 model) - all running latest OS. (iOS app can be a bit wonky once its all set up - like it doesnt want to display - but it is running in the background providing access to their servers)
It wasnt clear how to set an OpenVPN (requires a separate free iOS app and Tunnekblick for Mac). Email support was very quick and apparently 24 hour. They helped me through the configurations - everything works well.
VPN is notoriously difficult to set up, but my experience with ProXPN was excellent.

EMoeller about proXPN VPN | Free VPN, protect your privacy, v2.1.10