Frank's house is in a prime location, only 5-10 minutes away from many of Lisbon's main attractions. The staff are also very sweet. The house itself is more like a budget hostel with private rooms and a small shared kitchen and bathroom.
The main entrance is located in a narrow pedestrian road, so an Uber or bus cannot drop you off right in front. Accessing the place involves walking up and down many steep stairs. This was difficult for me because I had very heavy luggage.
The room itself was a very basic room, however there were constantly flies in the room. The bed was not comfortable and extremely squeaky. It was listed as a queen bed but it was 2 twin beds pushed together. Keep in mind, the walls are very thin and you can hear most movement from the room next to yours.
The shower was clean, consistently had hot water and they did offer towels.
The wi-fi often lost connection.
Overall, it was a decent place but I think for the value of the room, it was overpriced.