I use Isacord thread exclusively and have for over 10 years. I love it. I don't have any problems with it. I use it for piecing, thread painting, embroidery and quilting. I love the sheen it has and the durability. It is reasonable priced for me. I personally don't like Aurifil. It's very expensive and I find my machines don't like it. I have Brother, Juki and Janome machines. But, this is only my personal opinion.