In general it was good, exactly as we expected and as the other comments indicated:
-the bad things (although we knew in advance from the comments of people): the bathroom is indeed very small and can be a bit uncomfortable cause the shower is in the middle of it (everything gets wet after the shower). The kitchen is also small (we were not planning to cook so it was OK, but for people planning to do it may be a bit difficult. In any case i recommend eating the amazing italian food outside). The stairs to the 5th floor were also difficult for people a bit older.
-The good things: the location is really good, the flat was very clean and had everything we needed. i think the quality/price is good for Rome. The host was very nice and helpful. She arranged in advance the beds as we needed them.
-Things that could be improved: the breakfast is a bit basic consisting in packed cakes basically, when in Rome you can eat amazing things in any cafe. I understand that it's not possible to have a good fresh breakfast everyday at the house when you rent the whole place (as in other places where you rent a room and the breakfast is prepared by someone everyday), so I recommend to remove the "breakfast included" from the add cause it may lead to misunderstandings and just go outside for a nice breakfast.
As a conclusion, good quality/price for a few days in Rome.