Well, unfortunately, GM has not been able to bring over an Opel platform and have the results end up reliable.
They have a lot to prove in the quality deparment when you think of putting the Miata in the crosshairs. Time will tell if they succeed, but I'm not optimistic.
The ION is a downright nasty car inside and out... the redline may drive, but the interior is unsafe, flimsy, and cheap.
It's no Mazda3.