I always read the bad reviews first and can usually spot the "cranks". However, some poor reviews give me pause such as "declining quality" - "received opened or used merchandise" or worse yet - "blades appear to be knock-offs". The question becomes not who to buy from but what blade manufacturers are producing their own products and maintaining quality control these days? Where do groomers who are "in the know" shop, and what brands of clipper blades are the most reliable? I clip only my own dog and just a few times a year at that. Nevertheless, precision and dependability are key. Thanks.