The pre-installation and installation of the unit was excellent but I am very underwhelmed with the after service. I have had to phone on a few occasions to chase up a maintenance defect with the unit. There was an error with my first call which resulted in no app ref generated. I then had to chase a week later at which point this issue was sorted. I then had to chase for a date for the repairs. I then received a date which was 3 weeks after the initial issue. This is unacceptable when you rely on the unit to power your car. When I sent an email back to the lady querying the date I had no reply or confirmation and now I am left in limbo. Disappointed