I've been with G&W for several (5+) years. Always good service. At one stage 2 Morgans on the same policy.
Not tried FJ for the Mog, because I've not found the right person to talk to when I've been looking for insurance on other cars (other car clubs allegedly with discounts if using FJ). But then I've also found that with many other companies/brokers. Can't remember who the preferred MX5OC supplier was but I got a much better deal by just phoning Priviledge... The subsequent Z3, Boxster S and now the MINI have all been with Priviledge...
Cheers,