We were very happy with Michele's apartment. It was very pretty and very clean, in a lovely historical building (15th century?). The location is ideal--walking distance to Trastevere, the Capitoline Hill, and other sites, assuming you aren't completely averse to walking. The neighborhood is full of character, with kosher restaurants, narrow streets, and even some substantial Roman ruins just a couple of blocks away.
Michele himself was helpful, giving us directions and arranging for transport back to the airport. We would definitely stay here again.