Stayed here with my husband for 3 nights over a weekend. The place is perfectly OK. On the plus side the building is impressive and the staff are very pleasant. The residence (for that is what it is) is scrupulously clean, the beds are quite comfortable and the room we stayed in initially (one of 6) was quiet despite overlooking Via Ludovisi. We were required to move to another room on our third night as our room had been requested by other guests. This was explained to us on the basis that 206 was a superior room to which we had been upgraded at no extra cost, and on the third night we would be moved back to a classic room (202).
There was in fact very little difference between the rooms, 206 being slightly bigger, but I suspect the reality of the situation was that the new guests had read reviews on trip advisor saying that 202 was noisy and didn't want to stay there! It was a bit noisier being near the reception desk and we were woken early by an alarm clock and footsteps in the room above, but it wasn't so bad.
On the down side, I cannot really understand the glowing reviews this place has received. I perhaps expected too much from the 4 star rating. The decor is, to me, dated and bland. The shower cubicle (in rooms 206 and 202 at least) was extremely small. My very tall husband couldn't really reach his feet! Stick to tea at breakfast as the black coffee is instant and the cappuccino from a machine - a bit disappointing in the barista capital of the world! The lovely Italian lady on the desk in the evening, who didn't speak English, was unable to suggest where we might be able to get a good pizza, which you might have expected, though she did at least tell us about an area where many restaurants could be found. I would think the proprietor himself might have been more help in this regard but he was off duty all weekend.
In short, whilst the Beau Site was basically fine it in no way enhanced our stay in Rome. If you are looking for just a clean quiet bed, great, but if you want somewhere with a little quirkiness and romance, this definitely isn't the place for you.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC