I've been asked by a previous employer to comment on that site. It's also full of comments by the worst employees with an axe to grind over stuff that is their own fault.

There's good stuff in there as well, just take it as a source of information - not a realistic or complete picture of a prospective employer. I've had much better luck stalking employees directly, introducing myself and having an email conversation back-and-forth on what it's like to work there. Not sure how easy it is to do that outside IT circles, though.