Bluefins are for Fords and we have just released one for the Mini. Renault Clios are done by connecting into the OBD port behind the ashtray. It depends what you want from the chip as to who you go for.
We (Superchips) offer a warranty if you still have a manu warranty for a year/ 30000 miles and this can be renewed every year for a fee. We can also modify the fuel/ignition timing/rev limit on any Clio whilst also being able to directly improve the throttle response on the V6. Although we can't directly modify the throttle response on Clios other than V6 you will notice it is more responsive due to the changes we make.
We also do a 7 day money back guarantee if you want the chip removed, the only thing you will loose is the fitting fee which varies from dealer to dealer, although it should be no more than £50. We can also customise the chip for your car if you want but it is upto the dealer if they want to spend the time to sort a specific chip out for your car.