I recommend this appartment.
If you are a small family (4 persones) it is perfect for a short stay/long weekend in Rome. All the basics are working, good communication with the rental, nice service and a fair price.
The location is good and it is easy to get around with the appartment as base - if you wish to visit the Colloseo I recommend to go through Oppio park.
I'll not reconsider going back some time.