A word of caution! There is no fixed definition of re-mapping - to some companies it simply means using a laptop, some software and a Galleto type interface to wipe the factory parameters in your engine ECU and replace them with ones they downloaded off the internet or were supplied by the franchise they operate under. This is a lottery as the provenance of the settings they use are unknown and may have been developed to suit the majority of engines of the same series, or may have been simply copied off another car similar to yours. This is what the majority of customers get when they pay for a 're-map'.
What a re-map should be is an active adjustment of the parameters on your specific car done with a computer connected while the car is on a rolling road so that the adjustments can be monitored and the results checked, In addition there should be the facility to have the parameters changed by the re-mappers if after several weeks/months of testing you do not like the driving characteristics of the car or other problems appear. This sort of service is not cheap.
Pays your money and takes your choice, but do not equate re-map with a quality job as there is no industry standard and the majority of re-mappers (including some of the ones that get good write-ups in here) are simply 'fitters' - swapping one file for another.