Gustavo is a lovely and attentive host, the boat is in a nice location and comfortably fusnished, Gustavo also leaves a present for the guest, very appreciated.
The location is very nice, in Belem, lots of things to see and restaurants and bar.
But I would not suggest it for people who do not like to walk or climb stairs as to get there from public transport you need to do it (about 10mins) and there is no toilet/shower in the boat (just a pump with water on the deck) , you need to go to the nearest marina bath (climbing stairs, about 150m away) which has toilet and (mostly, so it was when I was there) cold shower, or you need to go to the other marina bath, along the street for about 900m, where you find hot shower. All in all the stay was pleasant, but I would not, especially in winter, stay for more than a couple of days.
Internet is also good, I watched movies with it no problem.
Definitely, it could be romantic if in a couple.