It was me who had a bad experience with them, won't trust them again
They were going to charge 2 hours labour when Darren (mortygttdi) did it in 30 minutes (amongst other things, but I won't go into it). They're not cheap either, only a few pounds off VW.
There are a few other specialists around the Leeds area, but it seems they're getting dearer in price. If you find a good one, let me know please (but avoid EGR).
For servicing, VW Wakefield are competitive in pricing and the service is reasonable (just don't let them wash your car).