I always ask WHY the user is posting the review. The best (bad) ones give qualified statements. For example, I do not like one of my Pfaffs because it eats the fabric (which I could solve with a straight stitch plate) and it stops sewing when it gives the low bobbin indication. Now that feature drives me insane, while it may not bother another user.
If you do your research, identify the features and price point, find a good dealer, and like what you see after test driving extensively - buy what makes you happy.