In the context of Dealer service, the MG Owners Club have run an annual Members Survey for many years, from which spares suppliers are rated by members. The results are published in the magazine with the number of responses per supplier which gives some balance.
Perhaps the MSCC might consider a dealer and specialist annual survey, because as I've said before, the comments on TM are not balanced, because some dealers are rarely or never mentioned, whereas others get regular exposure.
