The first thing you need to know about Mirko's place is that the pictures are an accurate representation of what you will get; the apartment is very clean and has everything you will need for your stay. It is in a residential district approximately 40 minutes' walk from the Vatican and one hours' walk from the city centre or Trastavere, with local shops, bars, restaurants and other amenities within 5-10 minutes' walk. There is 24-hours' bus service to Piazza del Popolo or Spanish Steps, or to connect to the metro (a single ticket of 1.50 lasts 100 minutes and allows for changes), which also stops close to the Vatican museums.
The apartment has three good-sized bedrooms; we were a party of four who wanted a room each, so we moved the folding bed into the spacious living room and were able to locate it so that it didn't interfere with the living space. Although the furniture is slightly dated, the standard of décor is high and the good-sized balcony (with seating and a table) offers a partial view - to the right - of St Peter's Dome.
Our stay at Mirko's place was a very enjoyable one; it may not be central, but public transport is a short walk away and it is quiet at night, there is plenty of space for parties of any size and it would be very difficult to find better value anywhere in Rome; it also boasts two bathrooms, which was very useful when everyone was getting ready in the mornings. It is in a residential block, so maybe not best suited to those who might want to party or to play loud music.
Mirko is also an excellent host, with plenty of suggestions for places to eat and drink, or attractions which may be less obvious than the more-publicised ones. When I return to Rome (one visit is never enough), I will be hoping that this apartment is available and would choose it ahead of the alternatives.