I can wholeheartedly recommend this place to stay in Thessaloniki. It is a bit far from the sea and you have to climb, but it's worth it. It's *quiet*. There is a lot of space (good for a larger group - like us), there are two balconies. There are supermarkets and local taverns for locals with local prices (My suggestion is, don't don't dine elsewhere).
And finally - there are cats everywhere 😎.