We've used these as alternative to the more expensive brands. These blades are an excellent value. Last as long as the name-brand blades. We buy in bulk and use these daily in our work.

They have performed well when cutting very hard alloy roofing sheets, however, they do not last long on hard alloy. On soft metal I would expect them to last much longer.

If you're looking for the right blade to cut 8020 aluminium t slot, you can't go wrong with this blade. That's what I bought it for, and it has worked perfectly on my table saw. Just be sure to use some blade butter or some sort of wax or lubricant, and you'll get nice clean burr free cuts. I've used it on the 15 series 1515 and 1530 regular, lite, and ultra-lite profiles without issue.

Great metal cutting blade. I use it with my Milwaukee M18 metal circular saw. Fits perfect, stays sharp for a while..

I've been using it for a while on my old radial saw. I cannot imagine not having it. It is so dead-on accurate I can cut a piece of MDF that is wider than my blade travel by simply making one cut and then flipping the piece over and lining up the edge for a second cut in the opposite direction of travel. It is bright enough for the majoritiy of my cuts - but if it were a bit brighter I'd give it six stars!
NOTES:
Based on the one I'm using, reviews describing it as "out of balance" seem nonsensical.
It's ready to go out of the package. The included batteries are spares.
I used a short piece of stiff wire (brazing rod) to line up the laser hole between two teeth on my blade and it worked perfectly on the first try.

I was a little concerned about the brightness after reading several reviews. Ordered anyway. I have LED lights on both sides of my miter saw and the laser showed up just fine. I'm not sure about durability but if I have a problem later I'll add a new review. Hardest part of installation was Loosening the Arbor nut.