My stay was great. You have your own apartment with hotel features: check-in and check-out were flawless and is working 24/7. cleanliness was also in top condition. The location of the apartment should be researched before traveling.
I personally had no acoustic complaints, it was very quiet and relaxing. However, since it is an old, nicely decorated apartment, there should be no reason to complain about acoustics. If you want this beautiful design, you have to expect it.
All in all super stay.