Private Internet Access is one of the most popular VPNs in use. It is fully featured and allows for easy setup and unlimited bandwidth.
Pro No logs are kept
According to Private Internet Access in 2013:
We absolutely do not maintain any VPN logs of any kind. We utilize shared IP addresses rather than dynamic or static IPs, so it is not possible to match a user to an external IP.
According to Private Internet Access in 2014:
We absolutely do not log any traffic nor session data of any kind, period. We have worked hard to meticulously fork all daemons that we utilize in order to achieve this functionality.