Panos' place is absolutely amazing and don't look else where. We booked a cab and porter service through him and I highly recommend that since it is a bit of maze to get there.
There are a lot of stairs in Santorini so be prepared for that.
We were woken up by breakfast showing up at our door and getting our room cleaned everyday was a nice touch.
The house is very private and you get your own plunge pool which is awesome. The sunset from the balcony is breathtaking. When we are back in Santorini next time, there is no doubt that we will stay here again!