I am using triangles on a roll and the triangles are pretty easy. It is sewing them all together straight with a good 1/4 inch seam that is the hard part. I am pressing seams open and that has helped.
It does take a lot of time. I check each part for measurements and trim as necessary. I find it is hard on my hands to handle so many little pieces so I take a lot of breaks too.
I am finding that both my specialty sewing feet for the machine make a larger than 1/4 inch seam so I am having to accomodate.