First of all be ready that there is NO 3 star service at all! If you prepare yourself for average 1 star hotel you can enjoy the positive sides this hotel provides. There are some actually. Starting with the location. There are only 2 lines of subway in Rome and to have the hotel in walking distance to the metro-station is good! Plus it's only 4 stops way to the exact center of the city. The district itself is very nice, though lacks good cafes or restaurants.
Our room was poor-equiped and needed renovation as soon as possible, but we had a huge balcony with beautiful view.
The breakfast they serve is quite enough to start your day but could be a little bit more various.
The main disappointment is front-desk. No "Welcome", no info about city, no even guidance to the room (we ought to find the way ourselves). It took whole 3 days to simply bring us TV remote-controller!
If you have other variants, choose them. If you don't - do not expect much from Regina Margherita.More