1. when I am at a retreat, it helps me stay on the line while I listen and talk to everyone.
2. everything ends up the same size
3. Bias is not an issue. Right now I have taken a 1990 Quiltmaker pattern and converted it to a foundation to make it easier to sew. It has a huge amount of bias in each piece and this will control it all. (got the kit for $10 because I think she was tired of the templates and realized how long it was going to take.)
4. I can use different sewing machines and still end up with the same size block.
I have made from queen sized quilts to 2 X 2 inch squares for a gift card using paper foundation techniques. I do agree that some like it and some do not. My best friend does not like not "seeing" what she is sewing and it frustrates her. But she does not like little blocks and I do so to each their own.