I like it. As others have said, it is a rebadged Mulvad. When I got it, Mozilla was slightly cheaper. The apps for Linux work well and the speed seems decent.

In the UK, you can use Curve. That gives you a physical or virtual card which proxies your existing Visa / MasterCards (not Amex).

But it doesn’t have an NFC app you can use on Android. As far as I can tell, there are no other virtual NFC payment apps.

And, of course, it doesn’t really improve your privacy posture. Your bank still knows who you spent with - as does Curve.

If you want a free fiver, you can use my Curve referral link - http://curve.app/join#D4MK9ZKN