I don't like the pin matching issue with trying to match seams that have been pressed open - I worry that my pin isn't straight and the seams are going to be misaligned.
But when you have very small blocks with lots of intersecting seams, pressing seams closed can make for very bulky blocks.
This month's blocks in the Moda Building Blocks quilt are 6" square and, with a mixture of flying geese and HST units, have lots of intersecting seams.
Even though I tried nesting seams in the right block, because they were so bulky, it made accuracy very difficult, as you can see, I missed a few points.
Annoying though it may be, the pin point matching in the left block ended up being more accurate.
I do hate it when "they" are right!