We stayed here as a family over New Year, with three young children. The location is superb - very central, in the middle of a maze of very pretty cobbled streets. At night, though, it was noisy. The windows are single-glazed, and we could hear absolutely everything. Every night a recycling lorry arrived to empty a glass bin at about 2am, and there were other noises throughout the night. Not recommended for light sleepers!
The flat was spacious, which we appreciated, but the wifi was patchy and the floors were not clean. The bed linen didn't smell especially clean, either. We couldn't use my baby daughter's cot bedding at all, as it smelled very strongly of cigarette smoke. The hot water was intermittent, which made showering a pain. The flat smelled bad - probably damp, or drains. The extractor fan in the smaller bathroom didn't work - which probably didn't help with the smell.
The kitchenette is very, very basic. For example, there was no bread knife, no scissors, no washing up liquid, no standard bowls... I think this could be made much clearer in the listing.
The location is fantastic, and the flat is in a lovely old building, which I imagine is why the hot water isn't brilliant and why it is smelly, but we paid a lot to stay here and were ultimately disappointed.