We had a really great time in Rome at Claus e Roberta's place, they were very helpful & friendly (despite being on the way to their own vacation as well). The place is spacious, clean and decorated nicely & very tasteful!
We already knew the area a little bit because of a previous trip - to us the apartment is perfectly located, while not being too loud/busy it's still very close to all the nice sights, has a nice park directly around the corner.. a super friendly & relaxed wine bar is just a few meters away (as is the next Metro entrance) and the little balconies invite to read one of the nice books & sip a glas of wine in the roman sunset. (although I still prefer Villa Borghese for that ;) ... thanks a lot Claus & Roberta - our favorite place in Rome, highly recommended!