Check in was easy and efficient. This was a last minute booking because I needed a place to sleep for a night before continuing my trip elsewhere and Maurizio was very accommodating. The apartment itself is huge. It is a bit dated but in general, of good quality. The bed I slept on was not particularly comfortable (think old fashioned spring mattress) but having AC in the room was great. Testaccio is a real Roman neighborhood with great food and a low key local vibe.
Overall, it was a pleasant 10 hour stay and I would recommend the place for large groups of people who want a more authentic Rome experience.