I was debating the same matter when i bought my year old FR.
In the end i had it remapped with about 6months left on warranty.
Car seems totally transformed and mpg is great if not slightly better.
If i could turn back time i would have got it done straight away!
sure is how you use it, my old mans will have 1000 miles on the clock roughly when it goes in for a map, lol, it will only be about 5 weeks old