What can I say, the blades arrived quickly and fit my tool easily. I've only used a couple so far, and they have worked well, haven't blunted yet, and seem as sharp as when they came out of the box.
The rest of the blades seem as well made, sharp and sturdy as the two I've tried, and seem to be similar in quality and manufacture as the OEM blades which came with the tool.
The price is great - better than the OEM, and gives better value than the cheaper sets I saw in the "big green shed"... just buy a set or two, you won't be disappointed.