I have had my Clio for ages and have had very few problems with her. I was the third person to own her, the person before me being my father.
The car is quite good on petrol and only need to top her up once of every two weeks unless I am making a several long trips.
When I was in university I made the 150 mile trip regularly and never had any problems with it.
I have had some difficulties with the car as it is now nearly 15 yrs old now. There have been some eletric faults which have been easily and cheaply resolved including issues with the dash lights and gauges and my lights. There has been some problems with the car not starting due to the immoboliser, however baring in the mind the age of the car these problems have not been major and it has "held up" pretty well. Also spare pairs have always seemed pretty reasonably priced and easy to get hold of.
It can fit 2 adults in and 3 children quiet easily for short trips however I wouldn't like to take a car full a long way esp not with all adults. As a tall person I am able to sit comfortably in the front seat however when I have sat in the back I have felt a bit clastrophobic.
The boot has also been more than adequate for my storage needs and my father was able to fit his golf clubs in comfortably when needed. I have also been camping and to several festivals as well as moved from university and been able to fit almost everything in in one trip. Larger items including furniture where a no go though.
I have always found the insurance on the car very reasonable and have been able to get some good deals.
Some of the other reviews have mentioned the bonnet opening up unexpectedly, I have been very lucky not to experience this however Renault did send me a letter and I got this fault fixed for free, the only issue it ever caused me was that it needed two people to open the bonnet, one to pull the lever and one to open the bonnet, which could be difficult if you are alone and need to get a look at the engine.
I am able to do some very simple things under the bonnet including fill the screenwash and check the oil, as a huge carphobic this is testimony to the easy of those tasks which are clearly marked.