I am using the opener on an Asta 9' x 9' rollup door. The opener works smoothly and quietly. I plan to purchase another one for the other garage door in my shop.
I do wish they had someone write the instructions who had a good understanding of English. They are a little hard to understand.
I had to cut approximately 1" off the driving lugs and 3d printed a tube to adapt the OD of the door shaft to the ID of the opener. I also custom fabricated a mount for the opener. I don't recommend a DIY installation unless you have some fabrication skills.
Overall, I am very pleased with the product.