We used Synlab for our PCR Covid-19 test in Italy. Can highly recommend Synlab.
We had our test done at 10am in the morning, and received our test results at 7pm the same day. We booked our test appointments 2 days ahead at a location near a larger city. Each test cost us 60 EUR, which was 50 EUR for the test plus 10 EUR for an English translation of the test results. We used the website locate.synlab.it to identify Synlab's lab locations.
The most cumbersome part was booking the appointments. To book the appointments, we used Synlab's iOS app. It worked, but it took a couple of tries till we got the accounts set up correctly, so we could book the appointments. At the test site, we received instructions on how to access our test results from a dedicated website. We downloaded the results as PDF documents from that dedicated site, and saved the PDFs on our phones.
Synlab's iOS app showed all open test spots. The website showed many of the locations to be fully booked, which they were not. The lab experience and speed was excellent. The iOS app and website experience was ok, once one knows how to navigate it.
This was August 2021. Hope this helps someone.