It gets good reviews because it's fun to play. The game is good at its core: you have to scan machines, aim at weak spots, move a lot in the battle to avoid damage, choose right weapons, or you can override them and enjoy the show, there are so many options and challenges. Besides, let's not underestimate the value of good graphics. They make the world nicer, more enjoyable, make you want to come back and play again. I understand that this game is not for everyone though.