the vpn of choice for me was always cryptostorm. It is token based authentication. If your looking for privacy then this is the best option. Reason being is you can buy a token from a cryptostorm reseller and then when used with cryptostorm they physically have no idea who used that authentication token, there for can not give out information on a user since that information is and never was used on cryptostorm.
The down side is you rely on the reseller platform to sell these and they can charge more for the token then cryptostorm themself.
I also enjoy using airvpn.org they are pretty straight forward on the website and list all the question you may have with answers already.