Originally Posted by
virtualbernie
I've been piecing with it and it's not too thick/heavy. I also use Aurifil but I haven't tried to fm with it and it is a 50 wt thread. If you find you are having problems with your 1/4" seams then switch but so far I haven't had a problem.
I need to explain this statement better

I just started using Isacord and it IS wonderful for fmq. I normally use Aurifil for piecing but I forgot to change out the thread when I started a new project and haven't had a problem with my 1/4" seams. That being said, I do recommend a thinner 50 wt thread. Funny, I didn't even realize I was using the thicker thread until Feline Fanatic pointed it out