Theo is great, very responsive and friendly. This place is a great value. The Omonia neighborhood is "ew". This place is 3 blocks from an active corner of addicts and prostitutes. If you are not looking for trouble, stumbling home or otherwise a target I would say it is safe. I would definetly stay there again. 10min walk to two Metros that take you anywhere. 20minute walk to Thissio. Plenty to groc, cafes, etc around.