Hi Guys I have a friend who installed one in his Landcruiser with good results,providing you don't expect it to cool stuff quickly.
I have the Waeco back seat unit that works like a divider between the back two seat and as an armrest.Both have the same innards.
I find if I put soft drinks straight from the fridge with one of those plastic Ice packs it works really well and keeps stuff nice and cold.
It does take a while to cool it down from ambient temp though. A lot of high end cars, Mercedes for one and some of the European trucks now come with the Waeco drawer fridges.
I am happy with mine and so is my mate with his drawer version. I think it's a good way to go.