Our stay at Louis Studios was great. Dimitris arranged an efficient pick up and drop off at the port, and helped us rent an ATV for our three days in Santorini (highly recommended!).
The studio itself was clean and had everything you need for your stay. The area was quiet and relaxing, and the pool area was a definite plus after hot days on the island.
One thing to note is that the check out time is listed as flexible, but we were notified the morning of our departure that we have to check out at noon, when our ferry didn't depart until later in the day.
Overall, I highly recommend Louis Studios for your stay in Santorini.