Be prepared to scan and submit a copy of your your ID's to the host, if not, the host will threaten to call the police on you. We stayed at four other AirBnB's in Italy and no other host requested ID's from us or even charged us the additional taxes. I believe that most hosts bury these taxes in their fees or nightly rate. Also, i recommend that you ask the host a few days before your arrival for clear check-in instructions. Our check-in instructions were not forwarded to us till the morning we arrived. Since we are not Europeans, we had no network on our mobiles and therefore did not receive the instructions till we connected to the wi-fi available inside the suite.
Funny enough, even after all this, in the end the host was more concerned about receiving a 5 star review... here is what they wrote to me:
"Thanks for your stay, I hope you have had a good stay :) i will be very glad if you can make a 5 star review, is very important for me, i will do the same :)
you are always welcome in my apartment!"
Anyhow, overall the suite is pleasant, well situated and close to all the attractions and sites. As long as you prepare yourself as I noted above, you will have a great stay!