Alberto was very flexible with the check in and out times. We did not meet him in person but there was a friend who welcomed us at the apartment with the keys and we got some good tipps. The area is fantastic, if you like to be in the middle of Roman life. Get your Aperol Spritz at the bars right downstairs, sit at the square under your window, enjoy the evening sunlight and watch your kids playing at the fontain and the people passing by. Go for an evening stroll down to the river or to the Fontana di Trevi. And bring ear plugs for the night! ;)