In working with my private GMAT students, I've noticed a few important differences between the old desktop GMATPrep software and the new
online tests:
1)
Keyboard shortcuts (ALT-N, ALT-Y, etc.) don't work on the online tests (though I imagine they will continue to work on the actual exam).
2) When you review your answers on the online tests, the correct answer is already indicated (for maximum learning, it would be better if the GMAC went back to the old "Show Answer" button, so that you could re-try the question first before clicking it). In fact, it would be even better if your original answer were not indicated either, in order to facilitate what I call a "blind re-try" of each incorrectly answered question.


3) The "ESR" that is included with Exam Pack 1 is not yet as detailed or helpful as is the one included with the GMATPrep software: although it does provide "time taken per question by section and type" and overall scores, it does not provide sub-scores or percentiles for the individual question types in each section (Problem Solving, Data Sufficiency, Reading Comprehension, Sentence Correction, Critical Reasoning, Graphical Interpretation, Multi-Source Reasoning, Table Analysis, Two-Part Analysis), as does the desktop version of GMATPrep.
This is quite a glaring omission!Average timing information by question type is somewhat helpful, but what matters more is your overall performance on each question type, which used to be provided, but this key question-type data is currently missing from the online tests--at the moment all that is provided is an overall score, sub-scores in Quant and Verbal, and timing information.



4) When viewing overall section performance, the questions are organized horizontally (?) instead of vertically. I have also noticed a bug where the wrong question number shows up in the review screen.

-Brian