Perfect location, good arrangements. All worked very well for two families traveling together. The stairs were not a problem except for arriving and leaving with all your luggage.
The central location brings on the only downside- it was quite noisy in the evenings.( and some mornings- the upstairs neighbour had the tv on loudly from 5.30 some mornings). So if you are a light sleeper you need to bring good ear plugs.
Other than that we highly recommend this apartment and would certainly come back ourselves.