The only negative with the flat is the noise, so take your ear plugs or any other help, that's the price to pay for being in the heart of the city, less than 5 min walk from the Domo cathedral, the main train station, everything you need in shops, restaurants and services.
The apartment is very comfortable, and more well equipped than we thought, washing machine, dish washer, toaster, hair dryer, iron, etc. so you won't miss anything.
The high wooden ceiling and the staircase tell you that you're in a historical building with character and charm.
I definitely recommend this accommodation !