Myself and my partner stayed for a week here in the upper apartment and it was an absolute delight, out hosts helped us with everything we required and there is a cleaner who comes daily (in the afternoon). The Location is absolutely fantastic and we enjoyed every afternoon on our balcony in the sun overlooking the caldera. You get mind blowing views from here. Location wise you are literally 8 steps from the main walkway through oia. We would stay here again in a heartbeat. Wouldn't recommend the upper cave house to those with young (toddler age) children - steep stairs up to the loft could be hazardous with no handrails. The roof is quite low on the loft level as well but you learn to duck quite quickly. This definitely didn't bother us. And the shower is amazing!