I was once told this place was a bit pricey, but having used a variety of garages around south london, I have to say that: a) they are no more expensive than any other garage, and b) they do seem to be the best.
I have to add that I drive a Vespa, and they do seem to specialise in Piaggio bikes, so I can't speak for other bike users. In my experience they're quick, fix the problem (which sounds obvious but doesn't always happen some places) and don't take the mickey with the bill (again not a given).
For my money, they do seem to be the premier scooter repair place around.
After several unfortunate dealings with several other bike repair shops. Chelsea scooters have restored my faith in the british mechanic. I totally trust their diagnostics and always feel confident that their costing aptly reflect the excellent work done. :-)
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