We have moced twice - once from the UK to NZ, then from NZ to Australia.

In both cases we have used professional movers, and had no problems whatsoever. In both cases, we have tried to reduce the amount of stuff moved to the minimum, but have found that it might have been better to be a bit more generous with what we moved. After all, it is probably better to transport items by sea than buy new ones, in terms of environmental impact.