I had a great time at Green Haven hostel. The staff are more than helpful, the location is amazing and the atmosphere is great. As a surfer this was a perfect base for me to travel to many of Ubatuba's surrounding surf breaks and for people who want to learn how to surf the beach in front of the hostel was perfect with easier waves. The hostel also had bikes to rent making it easy to get around town.
It was good except the kitchen was extremely inadequate. More plates and bowls would have helped and also a fridge.