I bought one from B&M not long ago, and threw temperature sensors into it, and it couldn't maintain temperature, took ages to get to a low temperature, and it didn't reach the temperatures it claimed on the box. It claimed it could reach so many degrees less than ambient, it didn't.
I found this youtube channel, and it is pretty cool:
They pretty much come to the same conclusions I did, and then compare against "actual" fridges.
Mainly USA centric though.
