Like Rod, I use Express VPN, although I also have a few months left on my subscription to PIA which I got from our Forums here about 2 years ago as a special offer at an incredibly good price.
In my personal usage, Express VPN is faster and has way more servers and great support. It is also based in the British Virgin Islands where there are no legal privacy barriers - as opposed to PIA which is US based and could, theoretically, be legally compelled to reveal users' data.
As a follower of Troy Hunt, I set up my DNS with Cloudflare's 1.1.1.1 with 1.0.0.1 as my second choice some considerable time ago. Mainly for speed.
Anyhow, thanks for the link to that article, Nick. Very useful.
Ian