Reviews are like flyers in your local travel agency - some have no impact on you whatsoever, but some make you want to visit a certain place so bad that you literally can't wait to reserve a flight and a hotel. Writing a review is not about convincing anyone to do anything. It's about giving some honest opinions about a given product and listing its pros and cons.
If you're like most people then you might think that writing a journal/diary is child's play. That there's no possible value of such thing for a grownup. Well, think again. I always say that keeping a personal journal is the best way of warming up your writing muscle in the morning.
If you have an online business, or you're planning to launch one, chances are that at some point you will be searching for a web designer to redesign your current site or create something completely new.