All I can say is.... location, location, location! If you want to experience the amazing Santorini sunset from a private terrace, sipping on wine and snacking on feta, this is the place for you! We loved every minute that we spent at Maria's cave house. It is in the middle of Oia... surrounded by the most spectacular views and lots of shopping. What else do you need?
This place is definitely a challenge getting to with the steps. I agree with the others that have posted... if you have bad knees or big luggage, be prepared. Although it is totally worth it!
One of our favorite things we did (besides watching the sunsets) was hiking down the steps to the bottom and around to the cliff jumping. Although I didn't jump, it was a fun little swimming hole... and the view back up the mountain with all of the little village houses was amazing.
We absolutely loved our time at Maria's cave house and will definitely be back!