I'd feel I was getting 'finger f********' If I went to JKM!
I know they are bloody good, but there are a lot of other bloody good VAG forced induction specialists that are less well known, cheaper, but amazing nonetheless. I think a lot of UK tuners do over-charge.
Take my tuners, Storm Developments in Aldermaston. They charge 300 for one of their own excellent (or a great PDT) Stage 1 remaps. I'm only running REVO because of an ECU issue. There is no way the Revo map is worth double the price! They said they can get me an awesome stainless steel full turbo cat back exhaust system for £500. They regularly supercharge Audi S5's RS5's R8's and have been going for a long time. Go and take a look at the cars there! Andy & Alex are incredibly experienced and knowledgeable. They don't advertise as they get too much work, so they are not as well known as other tuners. They are completely trustworthy, and genuine enthusiasts, and will only ever offer you the best advice based on what's best for you and your car, not what's best for their pockets. Finding them through Dave @ PDT was a God-send!
http://www.stormdevelopments.co.uk/services/remapping/oem-ecu-remapping.htmlThey are soon expanding though, and going from 2 ramps to 4, and I think they are taking on more mechanics, so watch this space. i shall certainly continue to sing their praises and can't recommend them highly enough.