As my mother in law famously described this area, this is where “drunken englishmen do drugs”. She’s not very wrong, though :) We made a mistake of going there once, and we barely made it out. It was so crowded, it was almost impossible to drive. So, my advice is don’t go there. It is basically a huge teenagers party place 24h a day. If that’s your cup of tea, go check it out. Otherwise, it’s probably best to avoid it.
From Kavos northwards, the west side is not something I have much to say about. We did do a drive through a few years back, but I do not remember much of it, other than the fact that all of the beaches we visited from Potamia to Agios Gordios were very windy. I don’t like windy beaches, no matter how nice the rest may be.