I had some done last year. Never had a problem with using them, although I saw the various comments and ignored them, as there is always someone expecting a £160 job for £20. I've got a set of badly prepped Caterham anthracites where the paint is flaking that are next to go there. I use these on-track with slicks which need changing, so I'm going to go the whole hog and fork out the princely sum of £30 ea for them to remove the old slicks, strip and paint the wheels, then mount and balance the new slicks - that's what I call a deal. I usually leave them there for a couple of weeks, but they will do a same day service for a tenner or so each extra.