I just watched their YouTube video. It seems very easy and cheap. I'd be nervous of using it in case it gave a bad result and it turned out to be a false reading or different because of being a different assay than normal.
I thought I was being clever last year asking for an extra psa test at a different assay until it came back with a reading far higher than their normal undetectable. With tail between legs I rang up my Macmillan Nurse and she let me have an early psa test which was undetectable.
In conclusion this sounds great in certain circumstances probably but I'd be very wary.
Thanks for letting us know.
The YouTube link on how to do their test is on the Graham Fulford Charitable Trust website here:
https://mypsatests.org.uk/Orders/
Regards Peter