I have used Christensen services for many years and they have looked after all my cars. Andrew and his team are knowledgeable, diligent and friendly. They are happy to explain work done and work that needs doing in a way that is easy to understand as is non-threatening to those of us who are not mechanics.
For those who work in Wellington like me, its amazingly easy to drop off your car in the morning, catch the train into Wellington and then pick up the car on the way home.
I've never had any problems with them or any complaints in over 8 years. Fully recommended.