We really loved Maria's apartment!
We arrived by bus and got picked up by a porter who brought our suitcases to the apartment. Don't bring huge suitcases because they have to be carried down quite a few steep steps. Of course, you also have to climb them down yourself but it is totally worth it.
Maria was very friendly and helped when we had questions. On our first morning she came by and aswered questions and gave tips about what to do.
The apartment itself is very clean and cozy. You have a terrace with two deck chairs from which you have a magnificant view over the caldera! It is definitely unique and I would always come back again.