Antonio makes it very difficult for you to write a bad review by immediately adding you on WhatsApp and being just as genial and friendly as the other reviews suggest. However he knows his apartment is overpriced and extremely small - smaller even than the pictures suggest. Most annoying is the toilet (which he does not picture) which is about 3cms from the sink. The noise from the street is just about bearable but there was work being carried out in the apartment below which started at 7pm and did not finish till around 9pm on both days I stayed. If I had known about this (and I should have been told as he knew I was in Lisbon for work) and seen the toilet there is no way I would have stayed. To top it off I could only get the shower (one meter square) to be either uncomfortably cold or uncomfortably hot until my last day.
Avoid unless you are a dwarf or have a fetish for crapping in extremely small spaces.