The walk from the Train station is 30-40 min. Under normal circumstances this would not be a problem, but with carrying luggage up and over all the canal bridges it can end up being quite strenuous. Once there however the location was not bad and reasonably close to the main attractions.
The Agency who manages the apartment have very strict rules in place and basically require you to clean the house yourself (Dishes and garbage to be taken out) before departing otherwise a heavy fine can be applied.