Mercedes was very kind and sweet upon our arrival meeting her to get the keys was no issue at all. She gave us great advice about Valencia and even went out to get us some maps in English. We had no issues while staying at her apartment but the location was lacking a bit. You are in a central-ish location where you are fairly equidistant from all the major attractions but you are equally far away and would likely have to cab or bus to go pretty much anywhere. This was a bit of a pain as far a spending time and money in transit rather experiencing Valencia, but during that day cabs usually only cost 4 euros to get most places.