i have recently had my 1.9TDi remapped by a company called more-bhp in Cheshire and i have to say they did a fantastic job and it only cost £215, their website is www.more-bhp.com
if you want a look, i would recommend them over a plug in box as i had one of these from Tdi-tuning (www.tdi-tuning.co.uk
) and it kept bringing on the emissions warning light, as soon as i took the unit off the light went off.
I have since contacted TDI-tuning and the explanation was that the newer PD TDi engines are very sensitive to emissions changes, if i had bought the digital box instead of the analogue one it wouldnt have happened but as it was an extra £250 i thought better of it.
What i liked about the service from more bhp was that they have a software engineer that does the re-map by downloading your actual ecu software and changing it to suit your needs (rather than just uploading a standard map), the options were 'power' - 'balance of extra economy and power' - and 'economy', i went for the balanced one and the difference is amazing, still no black smoke and so much more torque in 3rd, 4th and 5th its unbelievable, a different car! Only took an hour and a half so would definitely recommend.