I have a JM, and the only issue I have is the BSOD problem. No horizontal/vertical lines. As it stands, when using the latest driver, it seems that while the BSODs haven't been totally eliminated, they've been significantly lessened - you might get one a month, whereas it used to be about once a day. That said, it hasn't been totally cured - the only surefire way to prevent the BSODs is to stick with the 332.60 driver, which doesn't have the same performance as the latest, 344.48.
Honestly, though, after the feelings of hopelessness and lack of support I've been having over this rather serious issue, my overall recommendation would be to avoid ASUS completely until they get their act together, because having no recall and no permanent fix after all this time is unacceptable, not to mention how I've been repeatedly ignored on the matter by support.