Well i've used them twice now, so that might be why. The first time was on my previous 535D so they gave me a further discount. Just talk to them , if you can get them down to £600 to come out to you and do it, it will be well worth it.
I've had no problems what soever with both remaps and the car seems to be getting faster, now i'm over 12000 miles.
I think this has to be one of the best engine's in the world - did i mention that a love my car ! Well the engine anyway
Just do it Carl , it really does make the car 20/25% better !