The wifi stopped working just after we checked in so we had to leave the following day as the hosts were unable to get it working again (we spent a good portion of our first full day waiting around for it to be repaired, letting in what we thought was the wifi tech support agent but turned out to be the owner (as hosts/property owners ourselves, we assumed the very nice couple who met us at the flat owned the property), all to no avail as it was not fixed, so we had to switch lodging the evening of our second night, which was obviously quite a hassle, having unpacked and purchased groceries, planning to stay for at least several days).
The mattress springs could be felt when laying on the bed (very uncomfortable mattress - needs to be replaced) and the shower is extremely old and dated and dirty. Also, the stovetop is from the 70s and only gets extremely hot if turned on (no in between/medium setting).
Positives are that it is a large space with good bones (ie original wood floors, beams, that could be fantastic if renovated), located just steps to the Trevi Fountain, and the property managers are very nice (albeit not very understanding about needing working wifi, or what a hassle it is/was to not be capable of fixing it).