Firstly, Jack's actually had the blade in stock, which was more than I can say for any of the seven local hardware stores I tried. Secondly, the blades and the shipping were cheaper than other sites. The USPS had the blades here within a few days - I was able to easily track their progress via a provided link - and I installed and used one a couple days ago to mulch a mountain of maple leaves and high-mow a perennial garden. Worked like a charm. I can't say much about the actual quality of the blade because I haven't hit any rocks or stumps yet. And this is silly but I like the fact that is stamped into the blade which side faces the grass. Dealing with Jack's was easy, affordable and efficient. I was lucky to find this site.