Aloha! My wife and I stayed at the apartment in the Piazza delle Coppelle for three nights. The location is amazing. As you walk to the local COOP (grocery store), three blocks away, you walk past the magnificent Pantheon. If my wife and I didn't know where to walk, we would walk towards the Pantheon just to get another glimpse of its beauty, and figure out our direction from there. Just below the apartment are some great eateries and bars that seem to be popular with locals. On a Saturday night, it can become noisy, but just turn on the A/C and you will sleep fine as it will drown out the street noise.
The location is perfect for walking to some great areas of the city. We made several walks to Trastevere, the Colloseo, Borgo, and etc. and it never felt too far.
If you have large/numerous luggage, and are not fit to climb stairs, this may be a challenge. We were on the 7th floor, which could be a challenge for some. We enjoyed the climb as it meant more room for pasta alla carbonara e un gelato!
The hosts were very responsive and helped with awesome recommendations on places to eat and requesting a cab for our 3AM departure to FCO.
Overall, it was a great experience and we would stay here again.
Ciao Aloha!