Walter's place is AWESOME!
We especially appreciated the clear and official format of his runthrough upon our arrival, as well as all the little touches and ammenities around the apartment (detergent, coffee, very basic cooking supplies, shampoo, etc.).
The apartment is safe, nicely decorated, and comfortable. The bathrooms are small/narrow (if you are a big person it might be tight), but typical for Europe. And the high cielings and open floor plan of the rest of the place is spacious. The bedding is cozy too.
Although not right near the famous sights, you can easily walk to everything you would want to see and do on a Rome vacation within 20 mins or so. There are several markets and restsurants nearby, including Pinsere pizza (so good!) and a really good gelato place within 5 mins northeast. Plus the place is very close to the train station so arrival and departure to and from Rome is easy peasy.
This place is a good deal and we would stay here again if we were lucky enough to return to Rome again.