When people want to buy a product that has long using period or costing a bit much of cash, they have to make sure that they buy the good products if not the best. Things get serious when people want to buy computer and its accessories. A good quality computer and its accessories will not only support someone's work well, but also will save quite much maintenance and repairing costs in the future. However, looking at the product advertisement alone is not enough, because advertisements only boas the good thing. For example, how does a customer know that his or her newly bought Cooler Master Elite really works as the advertisement said? The instant way to know the performance of a product is by looking at the product reviews. Customer reviews from high profile IT magazine can be a good reference. But of course, the fastest way is by looking at online reviews. Specific online reviews about ASUS MARS II, for example, can give you true point of views about the real performance of the product, because the reviews are based on the real experiences of those customers. In buying any computer, laptop or hardware, picking a great product is very important, because people do not buy them just to use them for a short while. Although online reviews can be very subjective, but they are great sources if customers want to know about a product's true performance after actual using. When someone posted a review about specific product such as Roccat Arvo gaming keyboards, he or she will not only tell about the positive points of the products, but also the negative ones (if there are any). This is of course something that an advertisement will not do. Picking the right online review sources can make huge differences between getting a good stuff and the bad one.