Claudia's place exceeded my expectations. It's very spacious, and the views out of the living room French doors with small balconies are amazing. You can even see the river. The entry is located on a charming street in the older section of town. Taxis will not be able to pull up to the door, but it is just a short (but steep) walk up the street. The building is secure as is the apartment. I had no worries.
I loved this location, because it provides easy access (walkable) to the cathedral, river, excellent restaurants, the Luis Bridge, and many other places you'll want to visit. Uber and the public transport are easy to use.
The kitchen is very well stocked with everything you will need for cooking, even containers for storing leftovers. The bed is very comfortable. The rain shower head in the bathroom is luxurious as are the extra large fluffy towels.
I found the place charming and light. A great place to come to at the end of a long day. The street was very quiet at night as well. There is construction working happening nearby, so during the early part of the day, you'll hear that.
Wifi worked fine for me. I didn't use it much, but I had no issues.
I'd recommend this place for anyone wanting to experience the old city.