Dont get me wrong, I'm not saying stay away from other proper tuners, but proper tuners will be very forthcoming about tuning your car - like what software, piggy back or replacement ECU will be required. I always say to ask any tuner how many they have done and using what kit, its very easy to weed them out then. I say stay away from "generic" tuners in the ones that think they can tune anything but cant, like the ones mentioned above - said on their website they can do it, but when they really look into it they cant. I wouldnt want them trying their random software on my car. Of course Abbey and RS Tuning arent the only companies out there, but if all you want is a quick remap with the lowest cost and hassle, you are hard pushed to beat them, and they are very well proven