I stayed four nights in this flat. Overall I felt it had everything you could wish for to spend an agreeable time in Palermo. It is very close to the centre of town and it is possible to organise really nice walks to the main tourist attractions. It also a Carrefour Market 10 minutes walk in case you are missing anything.
I did notice it was a bit noisy but after a couple of nights I got used to it. Unfortunately in Italy it would be near impossible to find a place that would be both quiet and located as close to the town centre as this one. It is a problem I have encountered pretty much everywhere.