I would stay clear of any type of training in Greece.
The Hellenic CAA in Greece can only by described as a maffia organisation. When I was going to convert my FAA ATPL to Greek CPL/IR it was really difficult. They did not have any books that you could buy to study for the exams (for example greek airlaw). The way you where proposed to pass the exams was to bribe the examiner. I remember when I sat an exam and I got questions about helicopters despite that I flew aeroplanes. I think they did this so they would fail you and then finally you would give up and pay the bribe. Once I got so upset that I went in to the management to complain about "the helicopter exam" and I said that the HCAA is runned like brothel. They threatend to press charges on me.
I am in Greece myself and I have found a good school with reasonable prices (egnatia aviation) but I will go to Spain to do my training. I am really scared of the HCAA.Things might have changed now with the JAA but I am not risking it.