My friend and I had a great stay at this apartment. The best thing is the definitely the location, less than 5 minutes from Trevi fountain and about 30mins to to Colosseum and the heart of Trastevere where there a numerous beautiful restaurants. Self check-in was really handy as we arrived really late at night due to delayed flight.
Marimax very kindly let us check out an hour later and then leave our bags all day at her friends laundromat below the flat - which made exploring the city so much easier!
One thing to note, the door into the flat opens straight into a steep downward staircase which isn’t a problem, but be careful!