If you do enough work on it everything is nice and easy to undo, then it's not so bad.
I think I've worked on at least one of our clios for 2 weeks straight now. I hugely dislike how illogical the design of somethings is. I never forget that to remove the alternator on the DCI you have to take the oil filter off!
Agree they are great cars to drive but an ass to work on!
Don't take it to a garage, you never bond with it quite the same.
edit: agree with the above, limited fault codes make it a nightmare with electircal problems. My old VWs would throw a code as soon as something small was up. That was useful. The Renault waits until it's dead to throw a code and then sometimes forgets. There is even a code which is "unrecognised fault"