Unbeleivable quality and reliability, plus it will be cheap if you buying in Euro's.
Their ECU's have been used extensively in M3 Turbo's, and they manage to keep all the existing fault codes etc etc.
So I'm sure in a N/A Renault it will be fine.
Wait for the K-Tec GEN90 ecu... spoke to Sean at K-Tec and he said that it should produce approx +20BHP and iron out the curve even on a standard car! Gets my vote.