I am assuming that people who bought the replacement blade, already own the saw.  If you don't own the saw, let me say this is a great product.  It keeps a beautiful straight cut on product up to about 6".  Wider stock is more problematic, but still possible.  If you live in an apartment complex and don't want to disturb your neighbors with a table saw, this is a very good option.  While the cuts are somewhat better and the blades last longer with the Japanese saws, if you are used to the stiffer Western style saws, it is too easy to destroy a $40 blade, and so now I'm using the Shark saws.