The way that you purchase your dog clippers does matter. If you are purchasing in store there may be an associate in the store that can give you some helpful tips. If you are buying from a pet specialty store that offers professional dog grooming services there will also be a dog groomer handy that may be able to help guide your decision. If you are purchasing online you will only have the comments left by the customers who ranked the dog clippers as well as the product description. In either case, as the dogs owner, you should take the time to research the best ones for your dog.