Reviews as an average is usually pretty good to see if a game is crappy/decent/good/great
But then you factor in your taste in games. It doesnt matter if 100 people here say "yes, its good, the reviewers underrate it" Because it still comes down to your own taste. So, do what I do. I...
Go to youtube and start searching "Nights Gameplay" "Nights: Journey of Dreams Gameplay" etc. etc.
Go to wikipedia and read about it by searching "Nights: Journey of Dreams wiki" on google. That way you can do some research about the gameplay and what the point of the game is, what type of game it is, etc.
Then last, READ the reviews (more than one) and find out why they think its good/bad.