I can totally recommend this place.
The view from the balcony was stunning. It was so nice to wake up and have that view from your bed, enjoy a greek yoghurt with honey and oats in the morning on the balcony or a glass of wine in the evening.
We booked the pickup through the host from the port of Thira. Everything went well. Driver was there on time waiting for us (ferry was 1h late so he had to wait a while probably). He drove us to Oia where the next person was already waiting for us to help us with the luggage since it are some steep stairs to get to the appartment.
They also came on the defined checkout time (2 guys actually) to help us with the luggage to get back up to the main road where we went for the bus to Thira. That help was very nice since the suitcase was very heavy and I had a broken arm.
The appartment (as all over Santorini) is small so with 1 big suitcase and 1 small one you cover a big part of the floor the open them, but the view lets you forget that immediately :D