Great location (can be a bit difficult for taxi drivers as it's a very narrow street but it's good for walking around and it was reasonably quiet, apart from the building work going on during the day). The phone reception was a bit on and off so best to go outside onto the little balcony to make any calls.
The flat is fine but limited in kitchen facilities (e.g. no coffee-making machine) but overall it was clean. The bathroom was very small and smelled a bit but we've asked the host to look into this.
The reception was nice and good safety; they also allowed us to store our bags on the last day after check-out.
All in all, it was quite a good flat for a couple who don't want to cook but want to be close to everything. I wouldn't call it luxurious but it was fine for a base.