The Hostel (the big gray house you see in the picture) is quite nice, very spartan but beautifully decorated. The size and position of this "private room" however is very difficult to tell from the pictures which are a bit misleading. You will be sleeping in the small white house you see in the photo, which is around 1.70 metres tall and the exact size of the bed (no space on the sides). It is in the grass behind the Hostel main house and above the river. This is beautiful but is means it is really humid and there are loads of mosquitos: to the point that you cannot stay outside. This small hut is made of glass with old clothes on the sides to make it more private but it is quite cold and humid in the inside too, as you can imagine. The small window does not close well so you get some slug inside.
It is an experience , it must be said, almost fun in a certain way, but perhaps NOT for 45 EUROS per night!
The next night we moved to the 6beds dormitory in the main house and it was perfect!!!! I would much more raccomend this and it is also cheaper!