Iris has a very nice and compact room with shower and toilet inside. Common room is only for the kitchen. It is very central and 2 minutes walk to Monastraki station as described. There were 2 main issues, 1-there was a cleaning problem on the floor, I believe/hope they will solve it soon and this is a one time issue.
2- There is a leather bag manufacturing facility upstairs with a cutting tool creating a disturbing noise during the day. If you are planning to sleep after 9am; good luck. Also elevator goes up to 4th floor only, you have to climb up to 2nd floor directly or get down from 4th. If you don't mind these, it is a great place to stay with a perfect Value/Money ratio