I never play this response because of this move i prefer the c3 sicilian.
Sicilian defense - Grand prix attack: Bust?

Grand prix is against sicilian, how does 1...e6 work against that? I would play something else off course if you reply with your french defense
Also according to the statistics on this website, the sicilian performs better against the Grand prix attack. ( about 44% win chance to 32% for white)

Dont underestimate the Grandprix Attack in the hands of someone who knows what their doing........
http://www.youtube.com/watch?v=I2Waqz3PMz4
I have been studying the grand prix attack lately and i think that black can have the advantage if he plays accurately. Also, i think with the key move h6 he really defends almost every whites threat. What do you think?