Hi,
I have a 2013 G6ET Mk2 and must say, I love it; great highway drive and good drive. It has just come out of warranty (on a new lease) and has $43K on the clock.
But, yes usual problems with transmission mount split, idler pulley noisey, bushes, front link pins, wheel bearings notchy, but was fixed just before the warranty ran out. Allow some money to fix these issues on a second hand model and would be in a happy place. They are a great car, good looking, great performance, but ford seems not to have fixed the usual issues after all these years...
Thinking of selling, but what to buy to replace the positives of a G6ET!