We stayed at Tiago 1 month. We loved the apartment location: quiet neighborhood, very sunny, short walk to the river docks. Tiago himself is doing a great job staying in touch and at communication, so feel free to ask him anything if you have questions. Still, for 4 people, we had some issues staying there.
For future travelers, please consider that Tiago's house in winter is a bit cold and the heating is provided using electrical heaters. This could be an issue also because the electrical supply in the apartment is limited (you can't use too many electrical appliances). Our fuses would go out very often. This was also an issue when cooking, we'd have to take out appliances since the stove was electric. One last thing to mention, if you are traveling more than 2 people, showering might cause humidity since there's no ventilation in the bathroom.
We had some issues with an iphone getting broken because of that, so please pay attention.
In the area, please make sure you try the bread from Gleba!