I am up in Scotland, so not local, but I also found someone on the Gtechniq website. He came to my dealer and worked on my car for 12 hours (over 2 days) before I took delivery. The water still beads off all surfaces, except tonight as everything has frozen solid! I paid extra for this person to take the wraps off the car and do a full 'new car' preparation: he was the first to touch the exterior (after the PDI) before applying the treatments. This came to roughly the same price as the coatings BMW wanted to apply. Money well spent IMO.
Options: HK sound, panoramic roof, auto and a few others.