My daughter had a 206CC 2001 i think, and loved it. No major problems with the roof, body or engine. Hers was the 2 litre and was really quite perky but no idea of fuel consumption. Very hard ride I remember and lots of knocks and noise from the hard suspension. It didn' seem to bother her TBF, it was her baby.
A colleague has a 206CC, around a 2003 I suspect, he's 50 ish and weighs about 16 stone. He likes it but has spent some fair money on it and it' currently using water but he can' figure where it going. No sludge or foam in the top end, he' mystified but it keeps running ok.
A comment in a former post states theyre a reliable workhorse holds true perhaps. A colleague of mine had a 207 hatchback. I was considering one and asked him how it was. Does everything you need it to , reliable...but its the most boring car i ever owned he replied.
Daughter also just sold her 2007Megane convertible, 2 litre. No major problems, her husband (garage mechanic) did fix the roof once and the automatic rear window did fail once but they traded the car in at that point. She had that about 5 years, good but very heavy car and fuel consumption was high.