I have been pressing open since I started quilting many decades ago. I like a very flat block or piecing unit. I have never had a seam come apart.
My advise .. try a few test blocks and see what you like.
Its funny a few years ago I had a large quilt top (all seams pressed open) .I was showing it a my LQS , and all of them loved how flat the top was. I then turned it over showed to open seams ... and a hush fell and even a gasp. They then all of them, as if on cue turned and walked away. It was as if I had committed a crime no one wanted to witness. It was then I realized I not only had come face to face with the quilt police ...it was the entire squad!
I laugh about it now wondering what the "charges" might have been. Maybe "illegal use of an iron", or "failure to follow local ironing laws", or "failing to yield to peer pressure".
Last edited by Lori S; 06-07-2014 at 04:43 AM.