This was my first visit to Lisbon with my two sons.
The apartment is perfectly located on the border of Baixas and Castillo so the whole of the centre is within walking distance.
It is quite as beautiful and stylish as it appears in the photographs - the beds are very comfortable (firm mattresses), the kitchen well-appointed, and the ac/heating very efficient.
One word of warning: there is major building work going on presently off the courtyard below. The windows are double-glazed so mostly muffle the sounds of early-morning jackhammers, but very light sleepers who might want to lay in late should be aware.
For me, this was a trivial negative in an otherwise overwhelmingly positive experience of staying in Manuel's apartment.