Love it; I bought it new and am working on riding it until it falls apart. It's a great around-town commuter/errand runner, and is OK for distance runs (would be better if I acquire a windscreen). At present the odometer reads about 33,500 miles. It is still mechanically sound, but I have had a couple electrical gremlins. Fortunately those gremlins did not strand me at the side of the road, they've been sorted and it's an Italian bike so, ¯\_(ツ)_/¯.
There is no factory passenger backrest. Best option there would be a Hepco & Becker Rear Rack & Top Case with a Backrest accessory.