We travelled with our 9 month old baby.
The apartment is located great, very close to the St Peters Square. In case you want to take a bus or train it is also very easy. We mostly walked one way and took the bus the way back.
Although the apartment is by a road, bus stop the noise isn't disturbing at all. The bedroom is facing away from the road and therefore you can barely hear anything which was perfect because of our baby. The bathroom is big and the kitchen is also fine size.
We unfortunately had to move out of the bedroom because the bed was cracking so badly that it woke up our sleeping son when we went to bed the first night. Other than this we had a great stay and we enjoyed ourselves very much! There was even some pasta, tomato sauce, coffee and biscuits to welcome us. Nice touch! :-)
The check in was easy, we were a bit earlier than agreed but we could check in, no problem at all.