Oh no, don't say that. I am (was) aiming for an IS 300h myself but this transmission/drivetrain issue has really put me off. :( I'm starting to think I need to get the 450h (GS) instead which, to the best of my knowledge, doesn't suffer from this, right...?
It also means going from a fully-equipped IS to a minimally-equipped GS, but I suppose I can live with that if I must (on the plus-side, the 450h is quite powerful which I love - I soooo wish 450h was available for the IS also).