There's nothing exaggerated in what you've heard, beejoo! The mozzies in Corfu are vicious, like you they seem fond of me me so I can understand you wanting to fend them off if you can.
I've used Jungle Formula, and one I think called Lifestyle Expeditions. Also those wristbands that are impregnated with some sort of deterrent and plug in devices for the bedroom are useful, you have to remember to take a European plug adapter though. None of these things smell great but it's better than being bitten. I'm going to Crete next month, does anyone know if it's a similar problem there at that time of the year?