This review is from: IRWIN 3074002P3 44-7/8" x .020 x 18 Tooth PortaBand Saw Blade - 3 pack (Tools & Home Improvement)
I use these blades on my DeWalt Porta-Band. They perform (so far) as well as any Bi-Metal blades I've used (such as Diemaster 2 blades, etc.). Really, I see no downsides. As for how long they will stay sharp I cannot say as I've only been using them for a few weeks so far. It will also depend on everything you are using it to cut. I would recommend these as the price is a real deal!
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