The beach is gorgeous and quite long. Easy to get there from hotel. A few cute restaurants next to it. You'll love it.
In the other hand, if you're not digging the long ferry ride, if flights are available, consider flying to Santorini and hopping the ferry from there. A little trickier to time, but a few days on Santorini never hurt anyone.
Get an answer from Aegialis Hotel & Spa staff and past guests.