I had a 307 2.0l 110 for around 3 years (doing 18k pa) without any major issues, only costs were servicing, and consumable stuff like Breaks, Exhaust and tyres. Overall I was very happy with it.
My Wife has a 307 1.6 and it's a similar story - other than normal stuff nothing has broken.
Sorry mate - but you'll be called a liar or similar because as far as most people in these forums go all French cars are rubbish.
It doesn't matter if yoiu own one, run one every day and like you report a trouble free life doing so, like the AOL bashers of old, the Microsoft bashers of recent years, the OcUK French car bashers of today will get you.
I bought my 307 just over 3 years ago - as brand new.
So it's just had its third birthday, has 46k miles on the clock.
During that time it has been back to the dealer for services at 20k & 40k.
There was a recall on that model which causes me to take it back.
Other than that it went in after the fuel contimination issue at Tesco - hardly the cars fault.
It has been a pleasure to drive - nothing special, but then you don't tend to buy something in that range to be "special".
It has power when needed, smooth and quiet drive and is certainly not the ugliest car in that class.
I've more or less learnt to ignore the 307 and/or general French car bashing that goes on.
So this is my second French car in a row, so I didn't buy a Mondeo or a Focus, so shoot me.
Occasionally I will add a post - however as a 307 owner/driver it appears that what I do say is no better weighted than yet another Frnech car basher.