Jagaux Bluetooth Adapter

I have a 2004 Jaguar S Type 4.2 and a 2006 Jaguar S Type 4.2 VDP. Both cars show NO PHONE when I press the phone key and I cannot get the Bluetooth engaged, if they even have it installed.

Has anyone tried the aftermarket Jagaux Bluetooth adapter? https://jagaux.com/

I’m considering buying it but want to get impressions of people who have used it. The wiring installation doesn’t bother me. Just the overall usability.