We had a pleasant week at Kalypso. Initially, we were a little disappointed because the room was a bit more basic/simple than I had imagined. I also got 16 mosquito bites on my first night (no AC), but I then took the AC for the remaining 6 nights, and bought a cheap plug in repellent, and got no more bites. The staff here are great. Elisabeth, Theo, Christina, Spiros and the others really go out of their way to make your stay a good one.
Be aware that the music from the bar area is fairly loud in the evening, until about 00.45, and starts in the morning (more mellow) at about 8.45, so if you have a room close to the pool/bar, you will hear it. But not a big problem for us - we were out most evenings anyway.