I really enjoyed my stay at the Tetris Container Hostel. In total I spent 4 nights there, first one single night and then I came back for three other nights because I really liked it. The hostel has a young vibe without being a noisy party place. It is situated on top of a hill, and is close to a bus stop going to the Brazilian side of the falls, to Puerto Iguazú, to the Marco das Três Fronteiras, and to the local bus terminal of Foz do Iguaçu. The patio of the hostel is great, you feel like you're in a small inn. There is a small swimming pool. The breakfast buffet is simply awesome, with fruit, cake, bread, ham and cheese, etc. The kitchen is well-equipped. Every evening at 8 you can grab a free Caipirinha from the bar, which is delicious too. The rooms for 10 and for 12 people are acceptable in size. The beds and the floor felt clean, and every bed has power sockets and a bedside lamp, which is uncommon and very welcome. The Wi-Fi is strong and fast enough. The people at reception are helpful in case of a problem, or if you need practical Info about the region. Lots of leaflets to guide your visits too. One negative point: while the lockers seem strong enough, they are way too small for large backpacks, which is what the majority of the clients bring along with them! So some of your belongings might be at risk, even if overall the hostel feels safe. Like other places in Brazil, the toilet might get clogged as well. But overall, I really recommend this place!