Anyone have experience using i24test/GenviewDiagnosis 10 Hour Covid Test for international flight?

Hi everyone, I have an international flight early on Monday morning and need a PCR test that tests negative for COVID 19.

I was wondering if anyone has experience with https://i24test.com. I want to take their 10 hour PCR test on Friday evening or Saturday morning to make sure I get results in before my flight. Has anyone else used this service on the weekend before? Thanks!