Stayed here for a long weekend in October. It is very close to the central train station Termini, so you have easy access to all public transport and you can reach it easily from the airports.
Of course you are right in the center of the city and can get to all the sites pretty quickly. However, the street Via dei Mille is pretty quiet, so you don't have to be worried about noise.
The hotel is small and simple and you could easily miss it from the street, because it does not have an entrance as most hotels, it looks more like an apartment building from the outside. But it is easy to find if you have the directions and the address.
Inside you have an old elevator, which is very small and will only fit two people and with a bit of difficulty also luggage.
The people at the reception take cash only for the remaining fee of the room, but are very friendly, speak english well and looked after our luggage, since we arrived in the morning.
The room wasn't big, but none are in Rome. The room was large enough for us though. The bed was perfect, clean sheets. The entire room was clean and was cleaned every day. The bathroom wasn't special, but the shower was excellent, warm and had good power.
There were two minor flaws; one was that we were woken early (around 9am) on the last day, because of the vacuum cleaning of the cleaners. The other was that the halls carry noise quite good.
We enjoyed our stay at Euro. Price-quality ratio was good for Rome. I can recommend this hotel to budget travelers.