the main issue with any megane, and indeed any french car, is that its as crap as a fiat but not as good looking, so why buy one?
Because their sport range leaves Fiat standing
Personally I think the other two frogs in it's class, the Peugeot 307 and Citroen C4 are better cars, they are nicer to drive are more spacious.
But that's very subjective, as you know. Renault offer everything from a cheap Twingo (shortly) up to the the Vel Satis, engines from a 1.2 16v turbo up to 3.0 V6s and so on...