PIA for almost 3 years, use for 8+ hours a day on nearly all my devices. Went with them because 1) all of the rave reviews, 2) many investigations and breakdowns of their safety/security practices, and 3) they accept gift cards for payment, which is pretty damn anonymous, since you can buy those with cash. They are good for general safety, but if some foreign regime or letter agency is after you, I’m sure there are better (more expensive) choices. Best damn technology service I’ve ever paid for.
I don’t know if it’s ISP throttling of plain traffic or something, but my internet is faster when I turn on PIA/VPN. Consistently amazing speeds, tons of server options, easy setup for any OS (lots of documentation), and maybe 2 glitches the entire 3 years. Each loss of connection lasted around 30 seconds, which meant that all I needed to do was disconnect and reconnect, and it was fine again. Totally recommended.
Though pay attention to what @auximines says below about anti-VPN measures on certain sites. Along with what they mention, I’ve also had certain YouTube videos refuse to load, and lots of TV network sites. But since I don’t Netflix over VPN, and I don’t need to see the few blocked YouTube music videos, it doesn’t really affect me.