I wonder if the reviewer Mo Harber-Lamond, ever actually used the PIA VPN, or did he just read about it somewhere else? If he had used it, even once, he would know that PIA is blocked by Google and a vast number of websites. It is almost impossible to run a basic anonymous search using google, without running against an almost infinite number of CAPTCHA tests.
I suppose it is possible to avoid the test by logging into Google but users with any sense of personal security are outraged by the prospect of Goggle using your search terms to create a marketing profile. As far as I know, PIA never refreshes it's IP address ranges, so once the address is logged by the Google server, it is almost impossible to avoid being tracked. All the other search engines, DDG, Bing, Yahoo, Yandex, etc, are rubbish.
When my PIA contract expires, I will not be renewing and will apply other methods to search the internet, quietly.