Had a recent stay here, and thought I'd post a few notes. The national park closes at 5:00, but the evening meal in the hotel restaurant is not open until 7:00. The breakfast was quite good, and included even with a cash and points stay.

As a guide for those budgeting how much cash to bring (as there is no ATM at the hotel) a taxi from the airport on the Argentinian side to the hotel was 90 pesos. The same driver drove us around for a day on the Brazillian side for $300 pesos (falls, bird park) and returned us to the hotel. From the Sheraton to the Brazillian airport was 200 pesos, although that price was for a 4AM pickup on a Sunday, so YMMV.

The outdoor pool was very cold, even on a hot day, and no hot tub/whirlpool was available. There is an indoor pool with the spa, but it is not included with treatments, but is an extra treatment (hydrotherapy) at additional cost. Steam room/sauna are available in the spa change rooms at no charge.

Sheraton link internet was reasonably fast, surprising for the location.