Hello everyone, I have just stumbled across an interesting travel website which gives unbiased reviews on resorts and accomodation. Go to www.thisistravel.co.uk and click on destination guides at the top of the screen, then click on 'i want to go to-' and there you will find two links - one for your hotel or apartments and one for your resort. There are reviews on all resorts and apartments in Halkidiki (including the Kostas apartments!!) There is also lots of other helpful information.
Hope this helps
Viv