I started out using BlackVPN, but access to their US and UK servers never seemed to work. I switched to PIA and found it was just as good, just as private and way, way easier to set up. However, I started having issues connecting to various sites - Netflix told me to turn off my VPN (um, no) and other sites required CAPTCHA style logins just to connect. After two months, I’ve switched to PrivateVPN. So far, they’re probably the most tedious to set up (on a mac,) but have the speeds and security of PIA and BlackVPN, their US and UK servers work and I can access Netflix again.
I’ve only been using a VPN for about 8 months. If accessing Netflix is important to you, I’d think twice about PIA. However, I do think it’s a great provider, and that’s a great deal. What you really want to do is check out TorrentFreak’s list of VPNs that take your anonymity seriously.