If your thinking about having your vehicle remapped please take care about who you choose to carry out the work!
If you are just going to go for the cheapest you can find you are without doubt putting your vehicle at risk with someone using generic maps that aren't suitable for your car, this can result in blown turbos etc
Make sure you use someone like Bulldog Remaps & Tuning that use custom written maps specifically for your vehicle and offer guarantees to keep your vehicle safe!
People that offer mobile mapping often do not have premises and will just take your money, install a poor map that might initially feel good but your car won't be able to cope with the demands placed on it and will result in component failure.