[malz]

Many valid reviews are written by former employees, so I'm not sure how you could verify those. A subset of those are from people with an axe to grind. Look at any company that's had layoffs, for example. In general, I've found Glassdoor to be incredibly biased, either shills (in a small company, nobody's going to publicly trash their employer with the risk of being identified), or trolls (any company, once large enough, has former employees who didn't get along with their boss and choose to escalate it).