Alvise is great and so is the apartment. Six of us stayed here and it was very comfortable and spacious. The location is great as you can walk to both main metro lines and to the Colosseum/Forum and other major sights. The bedrooms are along the back of the apartment and were very quiet so easy to sleep (Rome can be loud). The kitchen was very large and well equipped. The bathrooms were modern and very nice.
Alvise and his team were great to work with. He even arranged a pickup from the airport which was great. Everything went smooth. I would absolutely stay here again and recommend this place to my friends.
One other tip if you stay at this place be sure to check out the church up the street (the large one). I am not much of a church person but that church is very interesting. It was built in 432 AD (the outside and a lot of the inside was updated during the renaissance but there are still some original mosaics inside). It was very cool to walk in a church that was built as Rome was falling and civilization was seemingly ending for the folks who built it. Only in Rome could you randomly find a 1600 year old church one block from your vacation rental.