Strong points:
The location, in the old town, within walking distance to everything: sights, really good and not touristic taverns, churches - everything.
Parking in front of and near the house - a huge advantage in the centre of Thessaloniki.
Airy, nicely furnished and comfortable studio.
The price.
Weak points:
Not so clean - especially in the kitchen area and the bathroom. Visible marks on the kitchen furniture, the bathroom sink, the toilet and the bathroom furniture. I had to clean everything to be able to use them.
Also, the chairs, and the sofa didn't look clean. We used the towels provided to put on the chairs, and the bed cover, which was clean - freshly washed - to cover the sofa.
The smell inside. The furniture is old - some are antiques. Though very nice, and tasteful, there is a persistent stale smell. I used a car deodorant to make it bearable.
The air-conditioning, also, gives off a stale smell - I couldn't use it.
There is no window net for insects.
Conclusion:
If you don't have a problem with a bit of stale smell - like old furniture, and you are not bother by not so clean areas, the place is a good choice.
Pretty fair value for money.