I recently bought a Seiko Pogue that came with a service receipt from this place dated April 2013 and they charged only £68.95 which I thought was very cheap for a chronograph service. I certainly know that I charge more than that and I don't have a premises in central London to pay for.
The watch however was sold as spares or repairs and when I opened it up there were a catalogue of faults. I won't list them all as who knows what had happened to it between it being serviced and ending up in my hands, but when you see one of the balance wheels jewels has been oiled and the other is completely dry four and a half years after servicing it doesn't reflect well on the person/company who worked on it previously. You get what you pay for I suppose.