We stayed 4 nights in Thessaloniki and were glad we booked this apartment! The location is perfect - walking distance to all major attractions, about 15-20 mins walk to the train station, and 7 minutes walk from the bus stop (if you are coming from the airport). In case anyone else is coming from the airport like we did - we took bus 01X and got off at the second-last stop. It takes about an hour on the bus from the airport, and watch for the electronic sign on the bus to read "Next Stop Kolomvou" . Kolomvou is where you want to exit.
There are bakeries and grocery stores nearby too. Our favourite was Discount Market. It isn't listed on Google but it is 5 mins walk from the apartment. Just turn right out of the apartment, right again at the first street, and it will be on your right after a couple minutes' walk. Omega Pizza is in the same area and is extremely cheap.
For 4 nights, we found it to be ideal for us (a couple). The apartment is small but it was okay for that amount of time. A solo traveller would probably be able to have an extended stay here. I think it would be too cramped for more than 2 people. It was possible to cook basic meals like pasta or fried falafel.
Everything was very clean, we loved having Netflix, Wi-Fi was good, and the bed was comfortable. Value for money was excellent!