The place is great. It's modern, clean, everything you need. Not big, but ticks all the boxes for a perfectly comfortable stay for two people. Beware, there's no washing machine (and it was not said there is, so no complaints, it's just simply a thing that I personally didn't bother to check.) Very busy street under the window didn't bother us at all even though I'm a very light sleeper and locals use the horn very generously :)
The neighborhood is perfect too — you are in the center of events, but there are no crowds of tourists. Many places to have breakfast around, which is not quite common for Portuguese, as I've noticed. Convenient transportation, huge park nearby, bakery with perfect pastel de nata right at the corner :)
And the hosts were amazing, they helped us with all tiny or not so tiny questions we had. The check-in and check-out processes are as easy as one could imagine.
I would definitely recommend this place to anyone visiting Lisbon.