Nino place is a great place and recommended.
The place is right in the middle of all the great neighborhoods of Lisbon, with a lot of great views, restaurants and bars. Timeout market is just down the hill. Metro is close by too. Only caution is it is a steep hike to the place so if you have a lot of luggage, Uber is your best choice. The place is clean, well equipped and comfortable. The area, Lisbon in general, feel very safe day and night.
Nino is very responsive, and helpful. Didn't get a chance to meet him though. But his check in/out team is very nice, helpful and welcoming.