The biggest challenge is to spot the marketing bullshit. Unfortunately the guide is full of it. I sometimes read the description before and right after the film. Calling "Downhill" Lovecraftian for example (just because of use of cultists) or using a Susperia reference for "Red Christmas" (just because the DoP used coloured lighting gels) is simply misleading and the equivalent of a click bait article. I sometimes watch the first few seconds of a trailer, if available, to filter bad looks, shitty acting, etc. But in the case of "Red Christmas" the trailer suggests a complete different tone and content.
I get those descriptions are very subjective and always positive to promote the film, but I wonder if those are provided by the companies or written by an independent third party. And if I was involved"The Evil In Us" I would be pissed off as the text promotes "Crow"
