I go into it thinking the opposite. Reviews clearly written by management or someone trying to paint a better picture of the company than there really is. Cons can still be misleading but I’d be more weary of a fake positive review than a negative one. Maybe I’m being gamed too.
If you're interested in looking up the pros that a company has to offer, then Glassdoor is great.
If you're interested in the cons, then you have to go into Glassdoor knowing that information can be manipulated and/or inflated.