Using personality and job fit assessments can be really useful when trying to find the right employee for your company. They're easy to administer, objective, and insightful. Like all hiring tools though, they have their advantages and disadvantages. This is why the recruitment process needs to incorporate a multi-faceted approach. Just like you wouldn't by a car based solely on one factor, like fuel efficiency, you can't hire someone based on the information you attain from one aspect of the hiring process.
What assessments CAN do for you
What assessments CAN'T do for you
They can't prevent people from choosing test answers that will make them look good. There are ways, however, to minimize cheating and bias, through the use of: