Me and my boyfriend spend 3 nights at Do it Rome apartment. Location was perfect. Near railway station Roma S.Pietro (1-2 min walking) - so you can get everywhere you want, but you can get to the most famous places by feet too; near Vatican (5-7 min walking). Area around apartment was very quiet. Apratment quite small, studio-type, but perfect for couple. Very big pros is balcony - perfect for morning coffe and breakfest. Mario was very kind, answered to every question, gave suggestions and advices about everything. It was so much better than we expected.
We defintely recommend Do it Rome apartment.