The best part of this place is the amazing location! It is located on a pedestrian street and you literally have cafes right out your door, a money changing place and taxi stand at the end of the street, and you are just a short walk away from the harbor and all the major tourist sites. You can't get any better in terms of location in Thessaloniki and it's a great deal for what you get.
Katerina and Stella were great communicators and provided all the amenities we needed. They even provided toys, stroller, high chair, crib, and more for my toddler. Thank you! The place is older but charming and even has a terrace and balcony.
Advice: just make sure everyone in your group is fit to walk up and down stairs as the three flights up are narrow and winding and a bit challenging to carry heavy luggage up and down. I can say that we survived fine though with my 70-year-old mother and 17-month-old daughter. :)