Registering your car with Miracle Detail will help Paul speed up your booking. He'll also keep you informed of any developments or special offers. If you think that you'll be using Miracle on a regular basis, it could make sense to become a member. This entitles you to a 20% discount on Paul's services.
Membership costs £150 per year, and is refunded if you don't make a booking within that 12 month period.