The apartment is fairly large by Testaccio standards. Both bedrooms are quite big and so is the living room. It's larger than you might think from the photographs. It's not a stylish apartment but very very easy to feel relaxed and at home in. We really appreciated the little balcony; when the weather is good, it's lovely. We've been there twice and have found it easy to communicate with Lina. Checking in, which is often where problems can occur, was easy—we were able to drop off our luggage early, which was a relief. If you don't know Testaccio, Lina's guide to the area is very useful. The 170 and 83 buses and 3 tram are all close by, and these will take you to most sites that tourists would want to visit.
Honestly, we had no problems at all to report—and we'd love to return.