We were very disappointed with our stay. Undoubtfully, the apartment's location was great: short walk to most tourist attractions, shops, restaurants, and public transportation. That, in a way, defined its biggest disadvantage: nightlife noise, manly from the nearby restaurants and bars. The weather was hot, and since there was no air conditioner we had to open the windows at night, and couldn't sleep because the noise would continue well into early morning hours, but then at 5-6 in the morning they would start loading or unloading crates with glass bottles, and that would make it impossible to sleep with the windows open. That was a real challenge, and that's the main reason I can't say we enjoyed our stay in the apartment. Maybe when it's colder outside and the windows don't need to be open during night hours, Sarah's place would work better, but can't state that for sure.
In addition, there were a few issues we experienced that could have been easily fixed or prevented on my opinion, but still they were present when we stayed there:
1 - the microwave smelled like burned coffee and indeed had coffee stains inside. I cleaned it up myself a couple times which somewhat helped with the smell but didn't get rid of it
2 - the trash cans with pedals did not work properly, we had to manually open them every time we needed to use them
3 - it's a big one!!! - floor nails noticeably sticking out of the wooden floors. I found it out the hard way when scratched my foot by one of them. Also, there were gaps between the floor panels that can be unsafe when walking barefoot.
4 - we didn't find a washer in the building (apparently, it was being replaced the week we were there)
5 - the dishes and mugs were dirty.
6 - the water stopper in the bathroom sink didn't work
A few words about the building. It's an old one and is quite neat. They have little glass displays on the main level, and a library on the third floor. The stairway, elevator, door and window design were old fashioned and really cute.