Maria's place is amazing! It is perfectly equipped with the basic you need to enjoy your stay. We enjoyed breakfast on the patio every morning - you can't beat the view. It was very nice to have an umbrella to be able to find shade if necessary - while the weather in Oia was perfect during our stay, the direct sun did get a bit warm! It's good to note that the bathroom is detached from the main house - you have to exit the front door and cross the patio to enter the bathroom. This wasn't much of an issue for us, but be sure to bring pajamas that you don't mind your neighbors seeing!
Oia is definitely a tourist location, so be prepared to crowd dodge every time you leave/come home. It was fun to browse the shops and restaurants, but we mostly shopped at the supermarket to save on meals. There is a local bakery on the main street that has amazing bread and pastries, as well as a delicious gyro place near the bus stops that has gyros for under 3 euro - what a deal!
The concierge Maria that the host Maria arranges made the trip absolutely wonderful! She told us about a local pool that we spent quite a bit of time at, as well as directions to the cliff diving spot. She even made us dinner reservations at one of her favorite restaurants! The concierge is an invaluable resource for getting tips on places to visit and activities, as well as helping you arrange any activities.
The highlight of our trip was hands down the evening catamaran tour with Sunset Oia. Swimming, snorkeling, chef-prepared dinner with unlimited drinks, and ending the night with a sunset viewing from the boat in Amoudi Bay - it was absolutely breathtaking. We would do it again in a heartbeat!