We spent a long weekend in Come una volta b&b. The location is great, in the heart of città alta, near the funicolare (that takes you to Bergamo city center in just 10 min). The house is clean, newly renovated.
We went to Bergamo by car and the host reserved a parking lot for us (not included in the rent fees), so not stress at all for the parking.
We will surely come back!
I highly recommend this place.