1) the host was very kind - they even helped us arrange a transfer to the airport.
2) the location is great!! Trastevere is beautiful.
BUT:
3) check in took 30 minutes of us waiting for host - even though they knew of our arrival time
4) the place was extremely noisy - if you are interested in sleeping this is not your place- even with earplugs.
5) the place was extremely hot - it would really help to have a ventilator.