I stayed at Alexandra's place for a week and absolutely loved it. The location was perfect, you are very close to a beautiful viewpoint, and great restaurants are nearby. Lisbon is very steep, so I recommend getting an Uber to go uphill and walk downhill toward your next destination.
It's close to some bars, where you can expect street noise at night, but earplugs were provided, and I had no trouble sleeping.
This is the perfect place to stay if you want to explore the city and immediately get to anywhere you want to go.