The best thing about Erdarelli is it's location. A few blocks walking from Piazza di Spagna and Fontana di Trevi.
The coffee and the staff were average. The bad evaluations go for the rooms, very ugly and old.

Really gross and dirty and smelly place. The location is great, but it's not worth it. Our room smelled very strongly of deodorizer. They were definitely trying to cover something up. The room was tiny with 2 single beds. The bathroom was large but there was no shower curtain, so the bathroom got very wet when you showered. The wallpaper was dirty and peeling off the walls and the bed covers were dirty as was the floor. We also had ants in the room and when we told the front desk guy at checkout he did not seem to care.

Location is great, near trevi fountain, spanish steps as well as 2 metro stops are 5 min walking distance. Thats about it. Rooms/bath are completely outdated, wallpaper peeling and dirty. Breakfast room is neat and clean but outdated as well. Breakfast less than average, cookies, few rolls, and some pie/danish. Staff, not very friendly, they didn't even welcome me to their hotel, some were incredibly bothered if asked for help while others were not as bothered but still reluctant. Moderate language barrier, thankfully i speak spanish which made it easier. The only way I would ever stay there again is if I were completely desperate to visit Rome as I was this time.

My husband and I have just spent a week at this hotel. We were on the fourth floor at the front of the hotel and we have the following comments:
- room tiny and 'double' bed was 2 small single beds pushed together
- wallpaper was peeling off the walls
- no air conditioning, and with temperatures at 35+ degrees this wasn't good
- single glazed windows which we had to keep open anyway due to heat meant we had the full volume of what seemed to be the noisiest street in Rome (I'm sure we heard tanks one night)
- bathroom minute...it was a pod-like thing in the corner of the room that would have served well as a sauna but was hopeless as a bathroom. And, as others have said, the shower is minute. If you are over 6 feet tall or have a few extra lbs then don't expect to get in. And god forbid if you want to shave your legs.
- no hairdryer, tea making facilities, bottled water, etc
- hotel was no smoking but some staff smoked at reception so you had to walk past clouds of smoke on occasion
- renovations were ongoing (which will be good in the long run) but meant we had to climb over painters on the stairs
- breakfast was continental but not great. Individually wrapped cheese slices (a la Kraft), cheese triangles, juice, hard buns, croissants which were glazed with sugar, juice, water and a hot drinks machine with the worst coffee I've ever had.

Positives are:
- it's in a good location - 5 minutes from the Spanish Steps, Trevi Fountain
- close to Metro station and all trips only 1 euro
- cost was 'affordable' BUT don't book through third party company - go straight to hotel website. We used Bookings.com and paid more than we could have.
- staff all seemed to speak a bit of English so easy to book in/out, ask questions
- they gave us a corkscrew to use when we asked
- gelati shop right next door (also sells beer and wine - open late)
- near lots of cafes/restaurants and 15 mins walk from a large park
- the lift worked (if previous user shut the doors after themselves)

So, if you want somewhere a bit shabby (and I'm not just talking old here) but in the centre for a half decent price then go here. If you can afford more - don't.