Rena's place is b.e.a.utiful. Like, seriously. It's a bit of a walk down a cliffside, so the porter is a huge help in bringing down luggage (and taking it back up). The morning views are stunning and it's close enough to the main pedestrian street that you're close to the action in Oia but far enough where you get peaceful time at night and in the AM when you want to be alone. Rena is very responsive which helped a ton in getting us situated.
PS - you are RIGHT by Atlantis Bookstore, the only bookstore in Santorini and it's the coolest bookstore I've ever been to. You should totally go. If you're into that. Or if you're not. Just go.
We wish we would've stayed longer. Thanks Rena!