Glassdoor reviews -- like all reviews posted online -- should be taken with a generous helping of salt. A general reason is that most people post reviews to sites like these to either rant or rave, and the employees who had neither a great nor a bad experience (the majority of employees) have little to no incentive to post thoughtful reviews. Arguably, however, companies that a higher proportion of stellar reviews are clearly doing a better job keeping employees happy, so the overall rating may be worth trusting. But heed this warning: I know of one company that has a policy of posting positive reviews on Glassdoor. And they're clever enough to always populate the "Cons" section (and avoid overly glowing reviews) so that they won't give themselves away. Apparently they were having a hard time recruiting new employees, and one of the reasons was negative reviews on Glassdoor. Because Glassdoor wouldn't take the reviews down, they decided to post fake reviews. After learning about this (through a former recruiter at that company) I have a hard time trusting Glassdoor reviews. Who knows how many other companies do the same thing to attract talent?