I have it and I think it works fine. I have only used “free” VPNs before so I can’t compare to other paid VPNs but it does is job. There are at times issues with one server, but that could just be my internet having hiccups. If you support Mozilla and what they do, I’d suggest giving it a try. That’s why I am using it. Plus Firefox Relay + container tab servers.
My new glasses had a blue light filter on them and I didn’t know it. I can definitely say that I have an easier time falling asleep / having my eyes feel not strained because of it. For a year or so by now, I turn on the night light on my computer anyway, and that helps too. I am a programmer so I stare at the screen the whole day. It doesn’t matter if it is placebo because I do feel the benefit and that’s all I care about.