PIA can be a little slow, but the big difference (and reason I use it) is that they don't keep any logs. A VPN provider gets a subpoena and they will turn over the history of what you did under there service. To my knowledge PIA is one of the few (like 2-3 I thought) that keeps no records and couldn't cooperate if they wanted to. I'm like 7 years deep with them and they still roll out new features and servers all the time. I consider them a pillar of what a VPN should be.