I highly recommend Magda's apartment. The apartment is exactly as it looks in the pictures - modern, minimalistic and very clean. Also, it is located within walking distance from a supermarket, a restaurant with high quality food and the Rotunda, a 4th-century AD monument which is worth visiting.
Apart from the above, Magda (and Vana) were amazing hostesses. Magda was waiting for my arrival and suggested me a restaurant for lunch while Vana was super fast in her responses regarding the details of the accommodation.
If you are on your way to Thessaloniki, Magda's apartment is a no-brainer choice. Till next time!