My family and I stayed at the Kolymbia villas recently and have no complaints at all. The properties are situated in a quiet spot, surrounding a large, clean pool. The villas themselves are spotless and well-equipped for holiday use. There is a lovely housekeeper on-site, who is happy to help you settle in and answer any questions during your stay. The villas are well situated, and are literally a five minute drive to Tsambika beach, which is well worth a visit. They are also well positioned for day visits to Lindos and Rhodes. Elias himself is a fantastic host, who is friendly and approachable. He is also available no matter what the time or request, should you have any issue - we had a small one with how to operate the A/C and he had it sorted immediately! He also offered to organise our hire car for us, which made the whole travelling/organising process so much easier. All in all, my family thoroughly recommend a stay!
Pro-tip - we arrived on the 9th September and there are very few children at this time of year but gorgeous weather, for those who want a quieter retreat.