Be aware that the photos presented are a bit off. The place is smaller than it seems and there was no view to the church from the apartment (the only view was to the inner "garden" with construction work). Rooftop was actually not made available during our stay wither (or at least not introduced to us during check in).
Furthermore, there's a temperature issue with their shower - the water is mostly cold and sometimes burning hot, but rarely warm which is a big downside. It's also not very tasty due to its high chlorine level, although it should be drinkable.
All in all, it was clean, in great location (apart from one incident in the nearby park with panicking people that we didn't quite understand) and the early church bells were no trouble compared to the voices of neighbours. However, my travel buddies and I collectively agreed that they wouldn't go there for the second time (unless the price was lower).