Me, my half-Italian family and a couple of Italian friends (six total) drove to Amatrice from Rome for Sunday lunch on a holiday weekend (Oct 30). We did not have a reservation anywhere (although we should have thought about it beforehand) and all restaurants in town were full. As it happened, it turned out to be the day of the autumn festival in town, which did not help. A local suggested that we try the Hotel Ristorante Roma, and so we did. The place, which probably seats a few hundred people, was packed, with various people in line saying that the food was good. It was obvious that the place was operating way over capacity and the reservation system (if ever there was one) had totally broken down. Since we had failed to reserve anywhere and were desperate to taste the real amatriciana, we were very happy when they said they could seat us if we returned at 2pm.
When we did come back, the place was total chaos. The manager told us to sit down at an uncleared table and that someone would come soon. We must have waited about 30 minutes before we cleared the table ourselves, putting the dishes on an adjacent uncleared table. That pretty much sums up how it went. We got NO service AT ALL unless we literally got up and intercepted someone. We had to get up and find someone to get knives and forks, to get napkins, to get bread and drinks, to order. We ordered 3 antipasti, 6 amatriciane and 3 secondi and waited 40 minutes before finally commandeering the antipasti. Surprisingly, 2 of the 3 secondi (arrosticini) arrived before the pasta and when we told the waitress the pasta hadn't come yet, the secondi disappeared, never to be seen again. (Meanwhile, they finished the third secondo, coratella, so it wasn't available.) We probably had to wait about 40 minutes or so, possibly more, before the amatriciana came. We gave up on the rest. In all, we were probably there for 2 to 2 1/2 hours. Other clients were seated, ordered, served more or less in order and on time, and left while we were waiting. But there were also other clients who appeared to share our experience. I would attribute the inconsistencies to total disorganization, not to malice. As it turned out, we were good sports because we didn't have anything to do, are informal people, felt bad about not having a reservation, and were happy to sit around chatting (although very, very hungry). But it's clear that this restaurant simply cannot handle anything like the volume that it was experiencing. There is no way this restaurant from the standpoint of service and organization can handle even half of its physical capacity. Reservations will not make a difference.
Now, about the quality of the food: we had a nice antipasto with affettati locali, and some very good green tomatoes sott'olio. The amatriciana was excellent, as noted in other reviews on this page. We spent €94 for the above meal plus wine, water and coffee. We did not pay for the secondi that we did not get. So, food quality and value were good, but almost incidental to the experience, given the above ordeal.
If you go at a time when the place is not crowded so that the service has a fighting chance, it might be okay. But if you go and see crowds, then stay away!