Hey Rick,
have been looking into this for a while now, Revo Custom Code and Celtic Tuning's division in the south
www.Southwestincartech.co.uk have all hit the short list.
what has swung it for me is that South west seem to be able to pull more from their maps than the others and also seem a tad cheaper (quoted £280 including Vat and pre and post dyno's). I have not lept into this and have looked around for a while checking out the credibility of these different places. Revo and CC speak for themsleves so the research really went into south west.
after searching for reviews, i managed to speak to a couple of people who have had work done by them, (one who i know personally lol) and they both said how impressed they were with them, the place is ran by two guys who basically seem to live and breath all car electronics! i have spoken to mark and he has quelled all my fears, and also offered to do the remap and then let me take the car out for an hour or so before i part with any cash.
he has also said that if the dealer reflash's from service or repair etc, that they will put the map back on for £30 (first time free).
not trying to blow smoke up their tail pipes or nothing, but just seems like a good deal all round really.
plus there quoting 201bhp for the Cr, a figure which my friend who i quizzed said is correct on his 10 plate sirocco 138 cr!
mine is booked in for saturday the 17th July (My birthday
) so will tell you all about how they are when i've been!