I must say I am generally quite a stoic person, but the Gmat official system is the worst system I have encountered in my recent times.
I felt like I am sitting in a dated library using a Window 98 PC trying to process questions.
The web takes forever to load, the system continuously crashes and glitches (button disappeared and stuck on a question, cannot move to next or submit answer); I have tried different browsers but no luck. More than often it crashed and I have to redo the questions - quite critical when you are time constrained.
If GMAT can see this, please put in some efforts into correcting this, I think your rendering method behind the code is not right, maybe written by a highschool student, as my university project can do better than this.
This is just a plain rant, so not much value-add here, but I thought I would put it out there.
Have a good revision everyone.