Gosh i'm seeing from all these reports that maybe is not better to use this tree to learn portuguese for now, maybe it's better if i move on to the english one, i don't want to learn it badly DX.
I guess it's what happens with every course when they're pretty new like this one, it takes some time and hundreds of reports to be able to really "trust it". I only use this one when I feel I have enough patience to stop the exercices every few minutes to report a sentence or make/read comments, else I use the EN-PT too.
I can understand if it happens to target language (in this case italian) but i'm noticing that from other complains that there are mistakes even in portuguese. Yeah, you are right, maybe it is better if i use the english tree for now (or even the spanish one, i deleted the english one for this one, duh xD!).