do you know Kefalonia well?
do you like Xi Beach ?
I for myself was rather shocked... It's the full tourism package and I wasn't prepared for that. This is rather a beach for families or "want-to-be-seen"-sunbathers and can definitely not be recommended for those who look for a relaxing afternoon at a secluded beach which is not too overrun. If it's not the pumping techno music which is being played full blast it's a motor boat or something similar killing your nerve. As a traveller this is no recommendation at all - as a package tourist who is only interested in getting a tan combined with some extras I may give it two thumbs up.