We absolutely enjoyed our stay in Harold's apartment. It's a beautiful and quiet place nearby all main attractions. We (three adults and two children aged 2 and 4) did almost everything by foot.
Location is great for going out for a run too! Walk along the river Seine towards Les Tuileries; lovely scenery.
Both Harold and Bruno were very helpful and kind and made our stay more than comfortable. Late check out was not a problem either.
I would definitely recommend this place to anyone visiting Paris!