Stayed at the Mabu for 3 nights recently and we loved this place.
Got a good deal via the web and the restraunts and bar's at the hotel are fairly cheap by British standards, food was good ,room was nice also. The pools are brilliant the water is very clean and is always the perfect temperature! The spa centre I am told by my wife is the BEST you get four treatments for about seventy pounds this includes massage, hot stones etc, great value.
Go to the Mabu you will love it , relax but don't take the entertainment to seriously it's pretty low key but the perfect chill after Rio!

Minimum 5 star.
This hotel is beautiful. I have nothing bad to say about this hotel, our whole experience from the bell boy picking up our suitacases to checking out was seemless. We enjoyed our whole stay and would recommend this hotel to anyone visiting the area.
Outdoor swimming area is better then the pictures, the rooms are good size.
The entertainment at the hotel is great, a piano bar and games room.

Mabu - huge! Great pools and probably great for kids but do not expect peace and quiet! Rooms are dated and there is maintenance work going on. Service is poor and rooms are not cleaned to a very high standard. If you pay rack rate for this then you must be totally crazy! We found this to be a bit of a comedy hotel.........the staff must be having a real chuckle at the guests paying the kind of money they do! Very loud aqua aerobics every day too...

Recently stayed in foz De Iguacu over xmas it was fantastic the service the rooms and the food are great ,i recomend to anyone going to Foz.
The waterfall is one site worth visiting and better seen on the Brazil side as you can see more because there are more falls in Argentina.