Nikos apartment is really great and I fully recommend it to every couple coming to Agia Galini.
The roof terrace is amazing with its view on the sea as well as into the mountains. We spent most of our time there as it also hosts an outdoor kitchen and a hammock for relaxing. The rooms were clean and with the AC sleeping through warm nights is no problem.
The communication with Nikos was fast and very good. He offered many tips for daily activities and where to go to at night.
The town itself invites with many restaurants and a large public beach. Though I recommend exploring the surroundings, as other beaches are much nicer :)