We stayed in La Belle Juliette over new year 2012. The hotel is well located in St Germain close to a number of cafes, restaurants and Vaneau Metro station. The hotel stunningly decorated and we were fortunate enough to be upgraded on arrival. The hotel staff were very friendly and helpful and hosted a complimentary champagne reception on New Years Eve for all guests.
The hotel will no doubt inform you that their neighbours are carrying out what appear to be extensive renovation works however, as we stayed over the holiday period no-one was on site and it certainly did not detract from our stay.
We'd definately recommend this hotel and hope to return.