We had a great stay at Ilaria's flat, she was very communicative and helpful, arranged a great airport transfer and gave us all the info we needed at check-in.
We were travelling with 2 kids and a very large double buggy. There is a lift that goes to the 1st floor however you still need to climb steps to get to it and it is very small. We were able to just carry the buggy over 2 flights of stairs.
Location: The apartment was great for us, 20-25mins to the colosseum but we took the metro which was only a 7mins walk.
Overall a great apartment for a great price. Don't forget to take into account the city tax and air conditioning into your final price (AC is essential in the summer heat).
Would highly recommend to anyone visiting Rome!