Our group of four people stayed at João's apartment for two weeks in the end of July and we left with only good impressions. The apartment may not be too spacy, but it never really bothered us, because we basically only slept there and spent all our days walking around beautiful Lisbon. We had every thing necessary for a comfortable living there - washing machine, dishwasher, microwabe oven, iron, cooking supplies and two comfortable beds.
João kindly met us at the airport and took to the appartment which is situated in the historical district Alfama which is closer to a lot of sights in Lisbon as well as to metro and tram stations.
João was an amazing host, always ready to answer whatever questions we might have had about either the appartment or the city. When we arrived there was a nice little gift from him in the fridge - a bottle of Portuguese famous green wine, which was a nice surprise after a long tiresome journey. And when we were leaving João yet again organised transfer to the airport for us.
In general, we never regretted our choice of the appartment and would absolutely recommend it to anyone planning to go to Lisbon.