Just got back from Antonis (20th May). Stayed for a fortnight with my dad of all people and have to thoroughly recommend the place. Our studio apartment was compact but well equipped and very clean and had great views from the balcony. The pool was fantastic. The bar was pretty good for what i saw of it apart from some morons who arrived three days before we went home. The drinks were cheap and the staff were friendly. The Antonis is in a good location for the beach, some good restaurants and bars and isnt too far to walk to the main bit of Kalamaki. Its near the Merlis supermarket (check out the woman who works there - she is hilarious once you get to know her, before that she's pretty scary!) and Merlis restaurant (again recommended). The only complaint i have about the Antonis really is that is was freezing on a night but we only had a really thin blanket, but i dont suppose that will be much of a problem if you dont go right at the start of the season!

forgot to mention - if you are looking for tours dont book with the reps as they are a total rip-off. go to pelargos tours on the main street going into kalamaki (on the left hand side). the boat trip (including smugglers cove) comes highly recommended as does the coach trip. i also went on the turtle spotting as the woman there gave me a discount as i spent so much time in her office!