If you get black, it would make a good imitation slate. Very good fire resistance. Lighter than Cal-Shake. Looks varied, but we rejected them bacause the roof would have to be reinforced. Some neighbors reported that their roof sagged anyway.
Fire resistance is fantastic.
Appears similar to Hardishake, but not as strong. Very good fire resistance. Rejected only because it didn't go with our house style. Minor disadvantage is that special edging is required to keep out birds, squirrels, etc. Lighter than Cal-Shake.