First, I'm quite new here, so hi!
Second, I'm targeting Oct. 1st as the day to take my GMAT. I'm about halfway through the MGMAT Number Properties
book as of right now, and I got to thinking that maybe before I go any further I should take a practice GMAT test to see where I stand. Is that generally considered a good idea, or is it better advised to wait until you get closer to the actual test date and do all of your mock exams then to build up your endurance?