We really enjoyed our stay at Petra's. Room 1 was clean and spacious, with a well-designed attached bathroom. The bed was comfortable and the shower large. We shared a kitchen with Room 2 and while he didn't keep it as clean as we did, we were grateful for the fridge and coffee/tea facilities. There was also a stove and microwave for people who want to cook. We found the local restaurants to be great, even the cute little neighborhood place across the street.
The location of the unit was perfect for us - far enough away from the city that you didn't get many tourists (we prefer living the local life) but close enough to walk to within 30-45 minutes. If walking isn't your style, there is a tram stop just down the block.
While it's far away, keep in mind this is still a city and an old building, so there is some city noise. We didn't mind it much and felt that the noise was reasonable (as people who live in another major city, we are used to it).
We would definitely return to stay at Petra's if/when we visit the city again!