Daniele is a very helpful host. He responds to emails almost instantly. He met us promptly and also came by a second time to help us when we locked ourselves out of the apartment (we were a bit confused about how the lock works).
The apartment is just great. Beautifully decorated, great sunlight, comfortable bed, nice amenities, outstanding water pressure, and quiet as a tomb. You know a place is quiet when all you can hear at night are the sounds of flying birds. And, the location is perfect. Restaurants, bars, the river, convenience stores, the main boulevard with the trams (Viale Trastavere), and on and on. Oh, and Biscottificio Innocenti, possibly the best cookie shop in all of Rome, is ten steps away from your door. My wife and I did not want to leave. I can't say enough good things about this apartment.
I'll end by saying that if I were to buy a pied-à-terre in Rome, I'd consider myself blessed to find an apartment as good as this one.
A helpful tip for folks who will be staying in this apartment:
The door lock. It's a four point dead bolt, strong as a bank vault. But it's a little tricky to open until you figure it out. You don't have to engage the four point bolt mechanism (although you should) to lock the door, as the single bolt locks automatically when the door closes behind you. Regardless of which way you choose to lock the door, to unlock it when you get to the final turn, you must turn the key counter-clockwise from the 9 o'clock position to the 6 o'clock position, but...it sticks between the 7 and 8 o'clock positions, so you really have to give it a firm push to get it to 6, and then the door will open without a problem.