We loved our stay in Roumeli, and we would definitely go back. We didn't meet Nadia, because she was in Athens, but her father Timos lives upstairs, and he was lovely, warm and helpful - despite only speaking two words of English - "no problem"! When we needed something, I would either email or call Nadia, she would call her father instantly, and it would get sorted out.
Although the house is big (and exactly as in the main picture), the apartment itself is quite small - it's the bottom floor on the right wing in the picture, behind the tree and the awning. But it worked for us, a family of 4 with two big teenage boys. You'll want to spend all your time out by the pool, anyway. The apartment is well decorated, clean and well equipped - it's a bit smarter than it looks in the pictures, rustic in a stylish way. But the pool area is really the whole point of being here, and it's great, with a lovely view over the valley towards the sea, comfortable loungers, a good mix of sun and shade, with crickets chirruping loudly in the trees.
We had the pool to ourselves - I'm not sure what it would be like if the maisonette on the left was also being rented out at the same time, when you'd have to share the space (the maisonette looks great, by the way, much grander than the apartment we were in).
We loved Roumeli, because it's so quiet (though it has a couple of lovely places to eat or drink), yet so close to Panormo (5 mins by car, or a 25 mins walk throug the olive groves), which for me is pretty much the perfect Cretan beach village - traditional and authentic in its atmosphere, seemingly untouched by package tourism, yet with all the restaurants, cafes, shops and amenities you could want. And inland from here there are fantastic villages, walks, sights - and if you like ceramics, Margarites is unmissable (best place there by far is Tsikalario, the pottery museum & shop just above the village).
So thank you, Nadia and Timos. We had a wonderful time, and we are very sad not to be there any more! But I hope we'll come back.