Had a fantastic time at Nat's place.
We, being a group consisting of 7 people, found the place to be very spacious, clean and very central downtown. The host Nathalie was most helpful with any organisational matters, already in preparations with finding the appartment or attaining its key, and even further along when she was very contactable at all times over the phone.
The appartment was separable by several doors so 4 people would sleep on one side and 3 people on the other side of the appartment, which ensured some privacy. Both sides were well equipped with each having an own bath, kitchen and TV.

The only downside one might mention was the hardness of the two couches, which functioned as beds for some of us, as there are only two ordinary beds. However, this is a small price to pay in regards of a very valued and otherwise very comfortable stay.

After all, we definitely recommend this place, should you ever stay in Thessaloniki!