I took part in the field trials, over 12 months fitted to my CLS55.
The novelty wears off very quickly......
The journey history is interesting, checking out ones cornering, braking and acceleration points.
The driving score is amusing, not sure it was calibrated for a high performance car.
The vehicle health check would be redundant on a Lexus 😉
The phone app was a bit buggy and sometimes lost journeys but I guess they should have sorted that.
I stopped using it when I got my RC and I certainly wouldn't pay to have one.
Also be aware you data could be shared with the authorities, e.g Police This from the T&Cs
"The AA may also supply Your data to government agencies and local authorities for traffic and highway management purposes"