Jimbo....

Mine is a Manual.......(And it doesnt have the dreaded swirl flaps....So if you havent removed yours, get them out quick!!!!!)..

Remap........ DEFFO!!!!!!!!!!!!!!!

Drives alot smoother and more responsive as you would think, also my MPG went up by about 3mpg round town.
Pulls like a train now.....(Same torque as a standard E39 M5....).............

It will just put extra strain on the usual componants i would think....but i had mine remapped at 114k, its now done 4k on it and no problems at all........