Despite the fact that I am traveling VERY frequently, it was my first time that I relied on Airbnb because I had to stay 2 weeks at Rome and I was afraid the a typical hotel room would be small and pressing. To my opinion, you trade more space and some special facilities (e.g. kitchenette and so on) vs. other facilities (eg. cleaning services, easy touristic information etc).
In any case, the overall impression is positive and I would suggest visiting the particular place. I enjoyed the fact that the building was built in 1846 and the lack of elevator was understood. The location is excellent: next to the Colosseo metro stop, whereas you can have lunch/dinner at dozens of all kinds of restaurants in a walking distance of 2-3 minutes. Needless to say that you can visit the antiquities in minutes as well.
The apartment had all the necessary facilities (and therefore I am not mention anything) EXCEPT the unreliable internet connection, probably due to TIM, as far as I can explain. If you have roaming services by Vodafone etc, then you can use your mobile device as hotspot.