One thing to be very careful about with the Waeco is the voltage drop. The one I have (CF50) monitors the input voltage, and if it drops below a pre-set level (around 12.4v from memory) it decides to shut itself off to protect your battery.
My problem was a battery in the front and the fridge in the back. I ran fairly chunky 30A cable, but due to the distance involved it didn't take long for the voltage to drop below the pre-set level and the fridge kept switching itself off. It would only really be noticable when the engine hadn't been running for about 12 hours, but this will depend upon the health of your battery.
I had a long chat with the tech support guys at Waeco, and they recommended 6.5mm cable to avoid the voltage drop. Unfortunately this is pretty much the size of starter cable, so that's what I ended up running from the front to the back of the truck, and terminating in a small fuse block - which I then used to run the rest of the auxilliaries in the the back. I actually ran both +ve and -ve cables directly from the battery terminals to avoid any possible problems with the vehicle earth. The fridge has performed perfectly since.
If you run a leisure battery in the back, you won't experience this problem, but I also recommend fitting high quality cigar lighter sockets or Hella type sockets to avoid any voltage drop there. The cheap ones are likely to prove problematic.