If I use my accuquilt to cut my pieces, I don't have any dog ears to trim, but there is a spot for that in the template for an easy trim. The lines are easy to use and see what to trim. And it was very accurate.
I found it easier to use in this direction, if I wanted to trim dog ears and the triangle without moving the template.
The only con for using a trimmer this way is for any mystery fabric, and, pressing afterward may make it wonky. I used the trimmer on a bunch 40s triangles I had found at a thrift store.
I am linking to:
chameleon color linky