Carl's unit was absolutely perfect. My wife and I enjoyed a month long stay in Rome in Carl's unit. Everything was even better than advertised.
Location: Perfect - right in the heart of everything.
Air Conditioning: Amazing - two built in units that were extremely effective.
Shower: Hot water and plenty of it.
Host: Wonderful and kind.
Cleanliness: Very clean.
Wifi: Superb - Internet had blazing speeds for someone like me who needed to upload large files while there.
Would certainly recommend to friends and would stay again when back in Rome.