Don't expect too much for this tiny studio rented out at prohibitive prices. It's clearly a rip-off. We rented it for one night only because Lisbon was fully booked at that time but it is clearly not up to the standards you would expect for that price. But hey, it's the law of supply and demand.
The studio would perhaps be ok for one or two people max (and not for 4 people like we were), and only for a short stay. Luckily we only took it for 1 night, spending more time there would ruin our holidays.
The place is so small that you have to close the couch bed if you want to open the (foldable) table. The bathroom is also extremely small - not for claustrophobic people. Plus, the apartment was hot (it's under the roof and has no AC, windows won't stay open unless you hold them, and even in that case, you would be bothered by the street noise).
I don't recommend at all. Communication was good though, I guess it's also because it's not rented by an individual but rather by a company who has several apartments like this and so it's kind of their job.
Be aware that there is no direct access by car (restricted access in that area of the city)