Great apartment, luminous and more spacious than the pictures suggest. Super clean and it all feels relatively new. Everything you need is there, also for a longer stay (fully equipped kitchen, dishwasher, washing machine).
As other guests have mentioned, the shower is indeed very small and narrow. I'm 1m93 and just fit underneath the shower and could barely turn in the shower cabin. The mattress is quite firm and the pillows are quite thin and fluffy; we could have used some more or firmer pillows.
The neighbourhood is quite nice, calm and residential with a great supermarket and a few nice bars and restaurants close by. It's a nice walk to Trastevere, although coming back it's uphill. We often used the shared bikes (Dott or Lime for example) which were always available close by.
A minus for us was the communication with the owners; it feels like you are talking to a big company. The week before our stay, we asked multiple times if we could check in early but didn't receive a reply (which was negative) until the check-in day itself. We understand that it wasn't possible but we would have liked to know up front; now we had to look last-minute for another solution to store our luggage.