We stayed at Monti one bedroom apartment. This was a small older apartment, but the bathroom had been recently renovated. Double bed plus sofa style bed in lounge area - this was perfect for us as it allowed our daughter to be sleeping in one room whilst we could be in the other talking or watching TV. Having the kitchen was fantastic. A reasonable selection of cooking utensils were provided, however the knives were a little blunt. Apartment was tidy and well located to access Colesseum, Roman Forum, via Nazionale, etc. We enjoy exploring on foot, and found it reasonable even to walk to Trevi Fountain, Spanish Steps, Vatican, etc from the apartment. Also well positioned to access public transport.
We used the airport pick up service offered by Apartments Apart - maybe a little pricey at about 60 euro for 3 pax (??), but worth every penny when arriving in the evening after a long haul flight with a sleeping 2 year old!! Driver was waiting for us as promised in arrivals hall despite a lengthy delay for our flight processing through immigration. The driver took us directly to the apartment as it was after office hours. The next day we walked to Apartments Apart office (probably 15-20 minutes walk) to complete check in procedure. Staff were pleasant and helpful.
Check out was easy - simply leave key in apartment (no need to return to office).
Highly recommend this apartment for couples or small families, and also highly recommend the accommodation agency (Apartments Apart) for reasonably priced central accommodation in Rome.