I will say, for my first experience staying at a lodge with my own individual unit, and in a subtropical region no less, I had a wonderful time staying at Overo.
The units are smaller but very efficient A-frame cabins, and mine was certainly comfortable enough and it added to the overall experience of my stay. The lodge is close to the park to see Iguazu Falls and downtown Puerto Iguazu, which is perfect.
The food and drinks were great and the service overall was excellent. The staff was very accommodating and I really enjoyed being able to communicate with them via WhatsApp.
I did not use the pool(s) or spa at all, but I did go in the off-season. The cabins themselves also came with an electric kettle, plates/silverware/glasses, and a stove (yes, a fridge too) which was nice to have if needed.
My only 4/5 star rating concerned the bathroom, which while perfectly functional, reminded me of an old camp grounds style of shower/toilet (concrete floor with drains). The shower was fine, but if any water made it past the shower curtain (which was pretty narrow), you could have some standing water around your toilet if it didn't dry up quickly. I had to wear shoes to the bathroom a few times when the time came. Not a huge deal if you are out and about, but it was a very small nuisance of mine.
Overall though, my stay at Overo was excellent and I actually preferred it over another hotel I went to stay at in downtown Puerto Iguazu. I'm hoping to come back again one day!