I've been doing pretty good on the ATI study guide, however, I just took the online assessment practice exam and I bombed... I got an individual total score of 54%... if the actual test is anything like the practice test then I'm screwed!!!
Yeah the practice tests are WAY harder than the actual exam! I scored a 60% on the PT then got an 82% on the actual one. When I took it the second time around, I got a 75% on the PT and an 87.3% on the actual exam. Do not let it intimidate you!