Like Westy says, don,t rely on the digital temp settings to be accurate.
I have two ARB's which I like, but always set them a bit colder like Westy's Waeco. 1 degree.C setting keeps food safe under 4 degrees. C.
Be aware that the larger the capacity of the fridge the more power it will consume.
And if used as a freezer it will use a lot more power than if used as a fridge. My 35litre as a freezer uses a fair bit more than my 60litre as a fridge. If I had the space I would have bought a Trailblaza.
They are the best, with their extra thick insulation.