Olga & Mirko's flat is perfectly located, just stone's throw the Vatican Museum with a couple of good cafés and restaurants downstairs. There is plenty of living space which is great (the photos aren't misleading) and our hosts were very accommodating with late self-check-in and self-check-out. The only problem we had is that cleanliness was below par (especially but not only in the bathroom) and our stay could easily have been 5 stars if the flat was spotless.