I have the Angler 2. I like it better than whatever other similar product is out there b ecause the lines go diagonally on both sides of your needle and the sewing lines are clear. The symmetry helps me keep the seam correct and balances well with the sewing lines such that I feel I have 'extra' help in maintaining that straight seam. [I did teach math at one time, you all.]
I do put some painters tape down on the portion of the Angle where you start with your fabric beause I found that material would get hug up on that. That works for me.
ali