I have a small Waeco (31l) with a busted lid, but it still works, just need to strap down the lid to keep the seal.
I also run Matsen 60l fridge in my car 24x7. I had issues awhile ago, thought it was the fridge, but ended up being a battery performance issue. BUT, the customer service offered by Matsen was helpful and I found them easy to deal with.
Only issue with the fridge, no light in a 60l, and the lid opens on the long side, which I did not think of to start with, but the fridge slide I am building now, may need to have a swivel plate on it