Hi Edeler,
The At-home GMAT is a bit more 'palatable' of an option at this point because you are now allowed to use a physical notepad. However, many GMATers have reported technical issues with their Exams and the 'format' of the Test is "fixed" (Quant, then Verbal - with no break in-between, then an optional 5-minute break, then IR). Having to take Quant and Verbal in one sitting is challenging for most GMATers (especially if you've been taking your CATs with an 8-minute break between sections). If you want to take the At-home GMAT, then you will have to be really rigorous about how you take your CATs going forward (and take them in the exact same fashion in which you will have to take the At-home GMAT). The content and patterns of the GMAT are the same regardless of which version of the Test you take though.
You took your first practice CAT/mock approximately 4 weeks ago. Have you taken any additional CATs since then (and if you did, then how did you score?)?
GMAT assassins aren't born, they're made,
Rich