We stayed in Nick's apartment for 5 days and we were fine.
Nick is very precise in his explanations on check-in details and is always very helpful. The place is comfortable, especially from a strategic point of view (very close to all places of interest), there is everything you need to have a great stay.
The only thing I Have to say is that the place needs a little renovation and some more attention to cleanliness.
For the rest, I would highly recommend it if you don't have too many expectations and really want to experience the city. The price is really affordable!