Hmm... I had love/hate relationship with mine. OK I am going back 20 years when I had it on the boat so the units may have changed since then.
Pros: Easy to buy and just plonk on board, always worked (in fact my 20 year old engel still works even after sitting unused for some years).
Cons: poor (thin) insulation
, takes up a lot of space compared to a custom unit built to fit your boat, not very efficient (due thin insulation
and static air condenser).
I ended up building a custom box around it (except for the condenser end) that had an extra 1.5" insulated sides, 1" insulated bottom and 2" insulated top.
If I was doing it again, I might add some flat fans against the condenser tubing.
I can't recall
the actual current
draws but it wasn't over the top.
But it really depends on your ambient temperatures, I found my set up was OK for cabin
temps around the mid 20's (C) but pretty sad once temps went above the low 30's (C).
Previously I had a custom built unit with about the same internal space but with 4" of insulation and a remote
cooled condenser and it was at least four times more efficient but cost 3 times the price
and took weeks to install.
So all in all, I liked the Engel but it wasn't great, rather it was just OK (and tough).