I will be using this for a forge I'm currently still working on, I also was lucky and live near a warehouse where they stock this product I did a local pickup. No freight feels good lol.
I will update this review when I finish the install/sealing and fire it up, but so far cutting was easy with a long sharp thin blade and it went in my small forge without any issues.
Make sure you are well protected when using this material, use a gas mask and gloves. Clean up after you are done, vacuum up everywhere so pets don't go sniffing and get this in there lungs.

I'm currently using this as the lining of foundry furnace, within a steel shell. I used a 2" outer layer at full thickness and, by slicing it into 1" swaths (not necessarily recommended), a 1" inner layer which could be easily replaced if damaged. I sealed exposed surfaces and the abutting surfaces between the three tiers of my furnace (specific to my design, ymmv) with sodium silicate to keep it from shedding, but have chosen not to bother sealing the inner faces until and if it becomes necessary. A utility knife cuts fiber blanket fairly well, but blades dull quickly. Use a well-fitting face mask when working with this material as its microscopic airborne fibers can cause lung damage. Mine is a 3M full face mask, but that might be overkill. I also wore coveralls which I washed after each session, and kept hazardous material outdoors as much as possible.

I recommend using pre-made 1" blanket if you need this thickness. Slicing it the long way produced way more airborne fiber than I would've liked, and I wasn't able to get truly clean cuts (lots of pretty thick, flappy pieces left hanging on the sides, leaving me to wonder whether I should peel them off or leave them attached.

In my limited testing so far, my furnace appears to be extremely efficient at melting aluminum in a steel crucible with my 3/4" propane burner. I may use my remaining fiber blanket to replace the solid refractory in my forge next spring.

The box shipped reasonably quickly, and weighs around 33 pounds. I saw some cheaper versions out there, but I was more comfortable with this product and seller after considerable research.

We got our shipment on time and the product was exactly as it was shown. Perfect!