I had the older type Waeco (with LED thermo panel) that ran well for a few years, started getting a few issues with it though, one time while camping my brother didn't "click" the lid down properly before bed on a warm night and I woke to a new deep cycle battery with only 5 volts, the auto cut off on the fridge failed and cost me $400 for a new battery, I gave up on that fridge when I went camping 12 months ago on a 2 week trip, first day with the new 80watt solar panel on the fridge gave me grief, I used to run it on a 60watt panel with no issues, anyways, it turned out that the fridge decided to run continuously and drained my batteries quicker that the panel could charge so it ended up being an ice box esky for the rest of the trip which meant we couldn't do the off road bush camping we'd planned for the second week.
As soon as we got home I purchased the Engle fridge/freezer combo and haven't looked back, more efficient, better construction and the lid concept alone is worth the extra $.
I can't comment on the new Waeco fridges but I personally wouldn't buy anything other than an Engle now, simply so I've got the confidence it won't let me down when I'm 2hrs from the nearest civilization, that alone is peace of mind and in my opinion Engle have the best reputation for a reason, sometimes you've got to pay extra for a quality product.
In fishing they always say "buy the best gear that you can afford" and that saying is true with many things, as long as you know what to expect from the product you buy there should be no "surprises".