Well, what can we say about this one? If it's available, book it. You won't regret it for a second if you appreciate living in a historical setting. There's a great combination between sensitivity to original features and modern conveniences like a dishwasher and washing/coffee machines. Despite its very central location the apartment is absolutely quiet at night, and it's true that you can hear the bells from the nearby church at key hours during the day. Absolutely charming place.
It's everything you need for an enjoyable stay in Prague.
For - Couples, solo travellers, business trips
Not for - Not the best if you're coming to party, it's a quiet area - Choose Zizkov or Karlin instead :)