We've never stayed at a cave hotel in the past so we didn't know what to expect.
This is a family-run hotel and Hasan and his family were so gracious and welcoming that we couldn't have asked for anything better. Hasan showed us to the top rooftop deck when we arrived to orient us on the layout of Goreme and to suggest a few short hikes that we could still fit in with the remaining daylight.
He also anticipated poor weather for our planned balloon flight and had already booked a backup flight for the following morning. Indeed, our original flight was cancelled (the government actually decides if it's safe to fly) so we were able to fly the following day.
Additionally, Hasan booked a private tour ("highlights tour") which was excellent! Erhan was an excellent guide with a great command of English and read the interest level of our group accordingly so he didn't keep talking when we just wanted to explore on our own.
The breakfast was also excellent -- a traditional Turkish spread of olives, bread, cheese, cucumbers and a few "American backup options" of omelets made to order and breakfast cereal.
The cave experience is a bit rustic -- so that's something that some might not love. The rooms were dim, the ceiling is low, and I hit my head on the doorways a few times (my own fault, obviously, it is a cave after all). You're not going to get marble bathrooms and glorious daylight with panorama views.
I highly recommend Tulip Cave and would stay here again, no doubt!