In my experience, reviews for video games simply aren't reliable, ever. Reviews for movies or books or music are a lot more reliable, as everyone will always be watching/reading/listening to the same thing; but in a video game it isn't like that. The player has an active role in it, meaning it's not just the person's perception of the experience that changes, but the actual experience altogether. A video game will always be completely different depending on who plays it and how they play it, and for this reason I don't see how you can possibly get an accurate representation of what your experience will be like by reading about someone else's.
For example, they might miss a vital piece of information which helps them understand a certain mechanic, meaning they struggle through parts of the game that you breeze through with ease. They might try a different way to solve a problem than you do, which might work better, or worse, but either way it will make their experience different to yours. They might just plain suck at the game - or, equally, so might you.
So what I've found is best is to read through reviews - lots of them - and look for the things that they keep bringing up. Look at some high reviews, and look through them to work out why those reviewers enjoyed that game. Then look at some low reviews and find what complaints they have, what things stopped them from enjoying the game. Then from there you can generally work out what the game is really like - whether the complaints come from a lack of understanding, or the recommendations come from a willingness to ignore flaws for the good bits - and decide which opinions you can actually trust.
