There is much to say about this hotel that claims 4 stars; not much good, however.
Let's begin with the location. The hotel's formal address is via Aurelia 619, Rome. In fact, it is not situated on Via Aurelia but 380 meters from there, downhill going, uphill returning; quite a distance from what a naïve visitor would think when looking at the map.
The reception desk: The Ergife is a large hotel with several hundred rooms. During most of the time there were only 2 and at most 3 people manning the reception desk. Check-in is very slow and tedious, especially when many people arrived as we did for a conference.
The room: It is large, clean, modern and well-kept. The architect who designed it, however, decided to have no shower door so that one person lying in bed, for example, cannot avoid seeing the other taking a shower. This could be pleasant for some but awkward for others. The shower head is a flat modern one, about 20x20 cm, but the problem is that the water pressure is so low that the water simply drips lightly. Not much fun.
Air-conditioning: When it works, it's fine. However, at around 08:00 each day (we stayed 4 nights) it is automatically shut off. The first time, going for breakfast, I reported this at the reception desk they told me it will be fixed. It was. The next day the same thing happened, and again and again. Please note, it is supposed to be 4-star hotel and outside it's 30 degrees Celsius and high humidity in Rome these days.
Phone service: The hotel phone card lists several functions available by dialling 50, including reception, maintenance and medical emergency. I tried phoning reception at about 09:00 one morning to ask them to turn on the air-conditioning but there was no answer for 20 minutes. So I went downstairs – using their very small and inefficient elevators that at times one needs to wait for minutes to board – and asked to speak with the general manager. He came and I complained about this and the air-conditioning.