yeah mine was fixed im in Australia .. still fixed. took it on the freeway just the other day and it's still great ..
As for cost the list ( that I've posed in previous posts ) is long so i ASSUME it's not a cheap fix.
Talking: motor out ,sub frame replacement ,bushes ,fluids replacement etc etc ..
I think the car was worked on for 3 days or so , so labor alone lets say at 100aud an hour wont be cheap !!
The characteristic BS is based on parts and labor costs.. ( that MG dont want to pony up for )
I really dont think that it's a doesn't work thing.. ( if it changes later well i don't know, but so far it's been great and vibration is gone ).
Mine's been solid since its fix months ago !!
All i get now is road surface changes which is normal for any car ..