not had a problem with my business ones as they are up to 40 years old. Britool, Draper, Gedore and well known names.
always keep them wound back and clean after each use. the business ones are calibrated for insurance.
cant speak for cheaper ones.
Alpha Calibration do our work ones, don't know about private but Mark the owner and Jack a technician both ride bikes.
http://alphacalibration.co.uk/about/